X-7/(46-X-7)=3(分数线代表除号)怎么求?

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X-7/(46-X-7)=3(分数线代表除号)怎么求?
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X-7/(46-X-7)=3(分数线代表除号)怎么求?
X-7/(46-X-7)=3(分数线代表除号)怎么求?

X-7/(46-X-7)=3(分数线代表除号)怎么求?
x-7=3(46-x-7)
x-7=117-3x
x+3x=117+7
4x=124
x=124÷4
x=31