120+.50x=30+.80x

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Solution for 120+.50x=30+.80x equation: 



120+.50x=30+.80x

We move all terms to the left:

120+.50x-(30+.80x)=0

We add all the numbers together, and all the variables

.50x-(.80x+30)+120=0

We get rid of parentheses

.50x-.80x-30+120=0

We add all the numbers together, and all the variables

-0.3x+90=0

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

-0.3x=-90

x=-90/-0.3

x=+300

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