x+1/0.4-0.2x-1/0.7=1等于

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x+1/0.4-0.2x-1/0.7=1等于
x+1/0.4-0.2x-1/0.7=1等于

x+1/0.4-0.2x-1/0.7=1等于
(x+1)/0.4-(0.2x-1)/0.7=1
0.7(x+1)-0.4(0.2x-1)=0.28
0.7x+0.7-0.08x+0.4=0.28x
0.34x=-0.11
x=-11/34