York has $72.Sally has $12.in order to let Sally have 3 times the amount of York,how much should York give Sally?
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York has $72.Sally has $12.in order to let Sally have 3 times the amount of York,how much should York give Sally?
York has $72.Sally has $12.in order to let Sally have 3 times the amount of York,how much should York give Sally?
York has $72.Sally has $12.in order to let Sally have 3 times the amount of York,how much should York give Sally?
纽约有72美元.莎莉12美元,让莎莉有3倍量的纽约,纽约给多少莎莉?
设纽约给x,则有
12+x=3(72-x)
12+x=216-3x
4x=204
x=51
72+12=84 84/4=21 72-21=51
so,should give her 51
(72+12)/4=21
72-21=51
51
设York给Sally x元,则
12+x=3(72-x)
12+x=216-3x
4x=204
x=51
York has $72.Sally has $12.in order to let Sally have 3 times the amount of York,how much should York give Sally?
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