(20-0.4x)-(10+0.6x)=7

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Solution for (20-0.4x)-(10+0.6x)=7 equation: 



(20-0.4x)-(10+0.6x)=7

We move all terms to the left:

(20-0.4x)-(10+0.6x)-(7)=0

We add all the numbers together, and all the variables

(-0.4x+20)-(0.6x+10)-7=0

We get rid of parentheses

-0.4x-0.6x+20-10-7=0

We add all the numbers together, and all the variables

-1x+3=0

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

-x=-3

x=-3/-1

x=+3

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