方程:3(X+2)=4(X+1) 9*3-1.7X=13.4 7X-3X=2.042 5(X+3)=20 1.4X-1.6*5=1.8
人气:292 ℃ 时间:2019-12-06 09:25:37
解答
3(X+2)=4(X+1) 3X+6=4X+44X-3X=6-4X=29*3-1.7X=13.4 1.7X=27-13.41.7X=13.6X=13.6÷1.7X=87X-3X=2.042 4X=2.042X=2.042÷4X=0.51055(X+3)=20 X+3=20÷5=4X=4-3X=11.4X-1.6*5=1.81.4X=1.8+81.4X=9.8X=9.8÷1.4X=7
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