90+.8x=30+.9x

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Solution for 90+.8x=30+.9x equation: 



90+.8x=30+.9x

We move all terms to the left:

90+.8x-(30+.9x)=0

We add all the numbers together, and all the variables

.8x-(.9x+30)+90=0

We get rid of parentheses

.8x-.9x-30+90=0

We add all the numbers together, and all the variables

-0.1x+60=0

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

-0.1x=-60

x=-60/-0.1

x=+600

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