100+.20x=40+.70x

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Solution for 100+.20x=40+.70x equation: 



100+.20x=40+.70x

We move all terms to the left:

100+.20x-(40+.70x)=0

We add all the numbers together, and all the variables

.20x-(.70x+40)+100=0

We get rid of parentheses

.20x-.70x-40+100=0

We add all the numbers together, and all the variables

-0.5x+60=0

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

-0.5x=-60

x=-60/-0.5

x=+120

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