A positive number is 5 times another number


Asked by admin @ in Math viewed by 355 People


A positive number is 5 times another number. If 21 is added to both the numbers ,then one of the new number become the twice of new number. What is the number.

Answered by admin @



Let the smaller number = x
bigger number = 5x. -----(we need this.)

if 21 is added to both; 5x+21 = 2×(x+21)

5x + 21 = 2x + 42

5x - 2x = 42 - 21

3x =. 21

x = 21/3= 7

So the positive number is = 5×7 = 35

answer is 35

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