Question
The sum of ages of P and Q is 15 years more than the sum
of ages of Q and R. How many years younger is R as compared to P?Solution
Given: Sum of ages of P + Q is 15 years more than Q + R. Write the equation: P+Q=Q+R+15 Cancel Q from both sides: P=R+15 Rearranged: P − R = 15
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