RS Aggarwal Class 7 solutions of Chapter 7 Linear Equations in One Variable Ex 7B in pdf free download Question 1.Twice a number when decreased by 7 gives 45. Find the number.Solution:Let the required number = xThen 2x – 7 = 452x = 45 + 7 = 52x = 26Required number = 26 Question 2.Thrice a number when increased by 5 gives 44. Find the number.Solution:Let the required number = x … [Read more...] about RS Aggarwal Solutions Class 7 of Chapter 7 Linear Equations in One Variable Ex 7B

## RS Aggarwal Solutions Class 7 of Chapter 7 Linear Equations in One Variable Ex 7A

RS Aggarwal Class 7 solutions of Chapter 7 Linear Equations in One Variable Ex 7A in pdf free download Solve the following equations. Check your result in each case.Question 1.3x – 5 = 0Solution:3x – 5 = 0Adding 5 to both sides3x – 5 + 5 = 0 + 5⇒ 3x = 5⇒ x = Check:L.H.S. = 3x – 5= 3 x – 5= 5 – 5= 0= R.H.S.Hence x = Question 2.8x – 3 = 9 – 2xSolution:8x – 3 = 9 – 2x⇒ 8x + … [Read more...] about RS Aggarwal Solutions Class 7 of Chapter 7 Linear Equations in One Variable Ex 7A

## RS Aggarwal Solutions Class 7 of Chapter 6 Algebraic Expressions Ex 6D

RS Aggarwal Class 7 solutions of Chapter 6 Algebraic Expressions Ex 6D in pdf free download Find each of the following products.Question 1.(5x + 7) (3x + 4)Solution:(5x + 7) (3x + 4)= 5x (3x + 4) + 7 (3x + 4)= 5x x 3x + 5x x 4 + 7 x 3x + 7 x 4= 15x2 + 20x + 21x + 28= 15x2 + 41x + 28 Question 2.(4x – 3) (2x + 5)Solution:(4x – 3) (2x + 5)= 4x (2x + 5) – 3 (2x + 5)= 4x x 2x + 4x x … [Read more...] about RS Aggarwal Solutions Class 7 of Chapter 6 Algebraic Expressions Ex 6D

## RS Aggarwal Solutions Class 7 of Chapter 6 Algebraic Expressions Ex 6C

RS Aggarwal Class 7 solutions of Chapter 6 Algebraic Expressions Ex 6C in pdf free download Find each of the following products:Question 1.4a(3a + 7b)Solution:4a(3a + 7b) = 4a x 3a + 4a x 7b = 12a2 + 28ab Question 2.5a(6a – 3b)Solution:5a(6a – 3b) = 5a x 6a – 5a x 3b = 30a2 – 15ab Question 3.8a2(2a + 5b)Solution:8a2 (2a + 5b) = 8a2 x 2a + 8a2 x 5b = 16a3 + 40a2b Question … [Read more...] about RS Aggarwal Solutions Class 7 of Chapter 6 Algebraic Expressions Ex 6C

## RS Aggarwal Solutions Class 7 of Chapter 6 Algebraic Expressions Ex 6B

RS Aggarwal Class 7 solutions of Chapter 6 Algebraic Expressions Ex 6B in pdf free download Find the products:Question 1.3a2 x 8a4Solution:3 x 8 a2+4 = 24a6 Question 2.-6x3 x 5x2Solution:(-6x3) x (5x2) = -6 x 5x2+3 = -30x5 Question 3.(-4ab) x (-3a2bc)Solution:(-4ab) x (-3a2bc)= (-4) x (-3) a. a2.b. b. c= 12.a2+1. b1+1.c= 12a3b2c Question 4.(2a2b3) x (-3a3b)Solution:= … [Read more...] about RS Aggarwal Solutions Class 7 of Chapter 6 Algebraic Expressions Ex 6B

## RS Aggarwal Solutions Class 7 of Chapter 6 Algebraic Expressions Ex 6A

RS Aggarwal Class 7 solutions of Chapter 6 Algebraic Expressions Ex 6A in pdf free download Question 1.Add the following expressions:Solution: Question 2.Subtract:Solution: Question 3.Subtract (2a – 3b + 4c) from the sum of (a + 3b – 4c), (4a – b + 9c) and (-2b + 3c – a).Solution:Sum of (a + 3b – 4c), (4a – b + 9c) and (-2b + 3c – a)Now subtract (2a – 3b + 4c) from 4a + 8c= … [Read more...] about RS Aggarwal Solutions Class 7 of Chapter 6 Algebraic Expressions Ex 6A

## RS Aggarwal Solutions Class 7 of Chapter 2 Fractions Ex 2C

RS Aggarwal Class 7 solutions of Chapter 2 Fractions Ex 2C in pdf free download Question 1. Write down the reciprocal of (i) (ii) 7 (iii) (iv) 12 Solution: Question 2. Simplify: Solution: Question 3. Divide: Solution: Question 4. A rope of length 13 m has been divided into 9 pieces of the same length. What is the length of each piece … [Read more...] about RS Aggarwal Solutions Class 7 of Chapter 2 Fractions Ex 2C

## RS Aggarwal Solutions Class 7 of Chapter 5 Exponents CCE Test Paper

RS Aggarwal Class 7 solutions of Chapter 5 Exponents CCE Test Paper in pdf free download Question 1. Write the reciprocal of: Solution: Question 2. By what number should we multiply (-6)-1 to obtain a product equal to 9-1 ? Solution: Let the required number be x Question 3. By what number should (-20)-1 be divided to obtain (-10)-1 ? Solution: Let the … [Read more...] about RS Aggarwal Solutions Class 7 of Chapter 5 Exponents CCE Test Paper

## RS Aggarwal Solutions Class 7 of Chapter 5 Exponents Ex 5C

RS Aggarwal Class 7 solutions of Chapter 5 Exponents Ex 5C in pdf free download OBJECTIVE QUESTIONS Mark (✓) tick against the correct answer in each of the following : Question 1. Solution: (d) Question 2. Solution: (c) Question 3. Solution: (c) Question 4. Solution: (b) Question 5. Solution: (c) Question … [Read more...] about RS Aggarwal Solutions Class 7 of Chapter 5 Exponents Ex 5C

## RS Aggarwal Solutions Class 7 of Chapter 5 Exponents Ex 5B

RS Aggarwal Class 7 solutions of Chapter 5 Exponents Ex 5B in pdf free download Question 1. Express each of the following numbers in standard form: (i) 538 (ii) 6428000 (iii) 82934000000 (iv) 940000000000 (v) 23000000 Solution: We can write in standard form (i) 538 = 5.38 x 102 (ii) 6428000 = 6.428000 x 106 = 6.428 x 106 (iii) 82934000000 = 8.2934000000 x 1010 = … [Read more...] about RS Aggarwal Solutions Class 7 of Chapter 5 Exponents Ex 5B