120+.70x=80+.90x

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Solution for 120+.70x=80+.90x equation: 



120+.70x=80+.90x

We move all terms to the left:

120+.70x-(80+.90x)=0

We add all the numbers together, and all the variables

.70x-(.90x+80)+120=0

We get rid of parentheses

.70x-.90x-80+120=0

We add all the numbers together, and all the variables

-0.2x+40=0

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

-0.2x=-40

x=-40/-0.2

x=+200

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