0.1(x+20)-0.02(x-40)=0.4

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Solution for 0.1(x+20)-0.02(x-40)=0.4 equation: 



0.1(x+20)-0.02(x-40)=0.4

We move all terms to the left:

0.1(x+20)-0.02(x-40)-(0.4)=0

We add all the numbers together, and all the variables

0.1(x+20)-0.02(x-40)-0.4=0

We multiply parentheses

0.1x-0.02x+2+0.8-0.4=0

We add all the numbers together, and all the variables

0.08x+2.4=0

We move all terms containing x to the left, all other terms to the right

0.08x=-2.4

x=-2.4/0.08

x=-30

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