90+.30x=70+.40x

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Solution for 90+.30x=70+.40x equation: 



90+.30x=70+.40x

We move all terms to the left:

90+.30x-(70+.40x)=0

We add all the numbers together, and all the variables

.30x-(.40x+70)+90=0

We get rid of parentheses

.30x-.40x-70+90=0

We add all the numbers together, and all the variables

-0.1x+20=0

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

-0.1x=-20

x=-20/-0.1

x=+200

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