Q2 of 25 Page 77

Solve the following equations

Given


Multiplying by on both sides


b + (b + 1) + (b + 2) = 84


Adding – 3 on both sides


3b + 3 = 84


Dividing both side by 3


3b = 81


b = 27


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Solve the following equations

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Mother is 25 years older than her son. Find son’s age if after 8 years ratio of son’s age to mother’s age will be 4/9

 2

The denominator of a fraction is greater than its numerator by 12. If the numerator is decreased by 2 and the denominator is increased by 7, the new fraction is equivalent with 1/2. Find the fraction.