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数学
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解方程3(4x-1)+5(3x+2)=7(2x-1)+1
人气:443 ℃ 时间:2019-08-28 02:07:43
解答
3(4x-1)+5(3x+2)=7(2x-1)+1
12x-3+15x+10=14x-7+1
12x+15x+7=14x-6
27x+7=14x-6
27x-14x=-6-7
13x=-13
x=-1
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