Answers

  • Brainly User
2015-10-07T02:03:41+08:00
Present ages:
Mom: x
Molly: 1 (x)
          3

In 12 years (+12):
Mom:  x + 12
Molly: 1 (x) + 12
          3

Equation: In 12 years, Molly will be half age of Mom:

 \frac{x + 12}{2} =  \frac{1}{3} x +12

2( \frac{1}{3}) (x)+ 2(12) = x + 12

 \frac{2}{3} x+24 = x+12

 \frac{3}{3} x- \frac{2}{3} x = 24 - 12

 \frac{1}{3} x = 12

( \frac{3}{1} )( \frac{1}{3} )x = 12( \frac{3}{1} )

x= 36

Present ages:
Mom: x = 36 years old
Molly: 1/3 (36) = 12 years old


0