90+.40x=30+.90x

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



90+.40x=30+.90x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

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