120+.40x=80+.80x

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Solution for 120+.40x=80+.80x equation: 



120+.40x=80+.80x

We move all terms to the left:

120+.40x-(80+.80x)=0

We add all the numbers together, and all the variables

.40x-(.80x+80)+120=0

We get rid of parentheses

.40x-.80x-80+120=0

We add all the numbers together, and all the variables

-0.4x+40=0

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

-0.4x=-40

x=-40/-0.4

x=+100

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