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数学
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解方程:3(X+0.5)+2X=15【怎么解?
人气:301 ℃ 时间:2020-06-26 16:33:00
解答
解,3x +3×0.5+2X =15 5X +1.5=15 5X =15-1.5 5X =13.5 X=2.7
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