0.4分之(7x-5)=0.8分之3x

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0.4分之(7x-5)=0.8分之3x
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0.4分之(7x-5)=0.8分之3x
0.4分之(7x-5)=0.8分之3x

0.4分之(7x-5)=0.8分之3x
两边乘0.8
2(7x-5)=3x
14x-10=3x
14x-3x=10
11x=10
x=10/11

(7x-5)/0.4 = 3x/0.8
7x-5 = 3x/0.8 * 0.4
7x-5 = 3x/2
2*(7x - 5)=3x
14x - 10 = 3x
14x-3x = 10
11x=10
x=10/11