(1+x)÷0.1-(0.4x-0.5)÷0.2=2/1求x
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![(1+x)÷0.1-(0.4x-0.5)÷0.2=2/1求x](/uploads/image/z/3767902-70-2.jpg?t=%281%2Bx%29%C3%B70.1-%280.4x-0.5%29%C3%B70.2%3D2%2F1%E6%B1%82x)
(1+x)÷0.1-(0.4x-0.5)÷0.2=2/1求x
(1+x)÷0.1-(0.4x-0.5)÷0.2=2/1
求x
(1+x)÷0.1-(0.4x-0.5)÷0.2=2/1求x
1+x/0.1-0.4x-0.5/0.2=1/2
10(1+x)-5(0.4x-0.5)=0.5
10+10x-2x+2.5=0.5
8x+12.5=0.5
8x=-12
x=-1.5