Homework Help: aig math

Posted by lidia on Sunday, October 21, 2012 at 9:59pm.

Rosa and Marty had the same amount of money.After Rosa spent $45 and Marty spent $117, Rosa had 4 times as much money as Marty. How much money did Rosa have at first?

I don't know the answer to this one so can you show me how you got your answer and what's your answer?

aig math - Reiny, Sunday, October 21, 2012 at 10:35pm
original amount of Rosa and Marty --- x

after spending:
Rosa --- x-45
Marty --- x-117

now Rosa has 4 times as much as Marty
x-45 = 4(x-117)
x-45 = 4x - 468
-3x = -423
x =141

They both had 141

check: after spending:
Rosa had 141-45 = 96
marty had 141-117 = 24
Does Rosa have 4 times as much as Marty ??? YES!!

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