解方程.(X-3⼀0.5)-(x+4⼀0.2)=1.6

2025-01-18 15:37:18
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回答1:

(X-3)/0.5-(x+4)/0.2=1.6 两边同时乘以1得
2(x-3)-5(x+4)=1.6
2x-6-5x-20=1.6
5x-2x=-6-20-1.6
3x=-27.6
x=-9.2