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Sally and Audrey had the same amount of money. After Sally had spent $60 and Audrey had spent $84, the amount of money Sally had left was thrice as much as Audrey's. How much money did Sally have at first? Please use basic math, I need this by tomorrow. Thank you!! ( The bottom one )

Sally and Audrey had the same amount of money After Sally had spent 60 and Audrey had spent 84 the amount of money Sally had left was thrice as much as Audreys class=

Respuesta :

AshEff
X - $60 = 3(X-$84)

X-$60=3X-$253

-2X= -$192

X=$96
Using units and ratios.
Both start with 1 unit(1U) the represents their starting money.
1U-60 = 3 × (1U-84)
1U-60 = 3U - 252
2U = 192
1U = 96

This the non algebra method, it's very similar in concept to the algebra method already shown. The difference is just using different representations.

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