作业帮2X(x-150)=5X(3y+50) 10%x+6%y=8.5%X800怎样解?
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2X(x-150)=5X(3y+50) 10%x+6%y=8.5%X800怎样解?
2X(x-150)=5X(3y+50) 10%x+6%y=8.5%X800怎样解?
2X(x-150)=5X(3y+50) 10%x+6%y=8.5%X800怎样解?
2X(x-150)=5X(3y+50)
可化简为：
2x-15y=550.
10%x+6%y=8.5%X800
可化简为：
5x+3y=3400
即由
2x-15y=550
5x+3y=3400
可解得
x=650
y=750
两题是分开的还是一起的
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