0.4(x-0.2)+1.5=0.7x-0.38(用方程解)
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![0.4(x-0.2)+1.5=0.7x-0.38(用方程解)](/uploads/image/z/169899-51-9.jpg?t=0.4%28x-0.2%29%2B1.5%3D0.7x-0.38%28%E7%94%A8%E6%96%B9%E7%A8%8B%E8%A7%A3%EF%BC%89)
0.4(x-0.2)+1.5=0.7x-0.38(用方程解)
0.4(x-0.2)+1.5=0.7x-0.38(用方程解)
0.4(x-0.2)+1.5=0.7x-0.38(用方程解)
0.4X-0.08+1.5=0.7X-0.38
0.4X+1.42=0.7X-0.38
1.42+0.38=0.7X-0.4X
1.8=0.3X
X=6
0.3x=1.8
x=6
0.4X+1.5-0.08=0.7X-0.38
0.3X=1.8
X=6
0.4x-0.08+1.5=0.7x-0.38
把0.4x移到右边,0.38移到左边,得
0.3x=1.8
x=6