3.5-0.4x=1.7x2

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3.5-0.4x=1.7x2
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3.5-0.4x=1.7x2
3.5-0.4x=1.7x2

3.5-0.4x=1.7x2
-0.4x=3.4-3.5
0.4x=0.1
x=0.25

1.7x2 啥意思?

3.5-0.4X=3.4
-0.4X=3.4-3.5
-0.4X=-0.1
X=4/1