SOLUTION: Ruth is x years old. In 12 years time, Ruth will be three times as old as she was 6 years ago. Find Ruth's age now.

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Question 1057204: Ruth is x years old. In 12 years time, Ruth will be three times as old as she was 6 years ago. Find Ruth's age now.
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
x+12 = 3(x-6)
x+12 = 3x-18 Subtract 3x and 12 from both sides
-2x = -30 divide both sides by -2, and remember -/- = +
x = 15 Ruth is 15
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Check:
15+12 = 3(15-6)
15+12 = 45-18
27 = 27 Correct.
:
John