SOLUTION: what is the answer and equation of the word problem marichu is 20 years older than krisfel.seven years from now, marichu will be thrice as old as krisfel.find their present ages.

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Question 1107925: what is the answer and equation of the word problem marichu is 20 years older than krisfel.seven years from now, marichu will be thrice as old as krisfel.find their present ages.
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
let x be marich's age and y be krisfel's age
:
x = y + 20
:
(y + 20) + 7 = 3(y+7)
:
y + 27 = 3y + 21
:
2y = 6
:
y = 3
x = 3 + 20 = 23
:
Marich's age is 23 and Krisfel's age is 3
:
check answer
:
23 + 7 = 3(3+7)
:
30 = 3 * 10 = 30
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our answer checks
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