12 Equations in one variable

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1. Numerator of a fraction is 5 more than its denominator. If 4 is added to numerator and denominator, the fraction obtained is 6/5 . Find the fraction. 1) 21/26 2) 6/5 3) 26/21 4) 26/11

2. Joseph’s weight is two times the weight of his younger brother. Find Joseph’s weight if sum of their weights is 63 kg 1) 23 Kg 2) 24 Kg 3) 42 Kg 4) 21 Kg

3. Mother is 25 year 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 1) 14 years 2) 16 years 3) 12 years 4) 18 years