来点人帮我算这几道解方程吧!感激不尽!要过程
①3x16X=2*10(85-x)②X/2.5-24=X/3+24③(1+40%)Xx80%-X=270④30(X+40%)+10(X+40)60%=4320...
①3x16X=2*10(85-x)
②X/2.5-24=X/3+24
③(1+40%)Xx80%-X=270
④30(X+40%)+10(X+40)60%=4320 展开
②X/2.5-24=X/3+24
③(1+40%)Xx80%-X=270
④30(X+40%)+10(X+40)60%=4320 展开
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