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数学
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解方程:x÷2+(10-x)÷3=4
要有过程
人气:339 ℃ 时间:2020-02-05 18:05:50
解答
首先消除÷2和÷3,左右两边同时乘以2以后再乘以3得
(X÷2)×2+(10-X)÷3×3=4×2×3
因为同时乘相同的数不改变等式两边的数,而且又把除的数给消除了
所以得
3X+2(10-X)=24
接着将等式乘开得
3X+20-2X=24
所以X=24-20
X=4
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