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[X-(1/5X+5)-(1/4x-7)]+(1/5X+5)+(1/5X+7)+1/8X=X
最后答案等于X=40
人气:497 ℃ 时间:2019-12-26 03:31:18
解答
X-(1/5X+5)-(1/4x-7)+(1/5X+5)+(1/5X+7)+1/8X=X
X-(1/4x-7)+(1/5X+7)+1/8X=X
(1/5X+7)-(1/4x-7)+1/8X=0
x=-560/3
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