posted by lidia on .
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?
original amount of Rosa and Marty --- x
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
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!!