90+0.80x=30+0.90x

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Solution for 90+0.80x=30+0.90x equation: 



90+0.80x=30+0.90x

We move all terms to the left:

90+0.80x-(30+0.90x)=0

We add all the numbers together, and all the variables

0.80x-(0.90x+30)+90=0

We get rid of parentheses

0.80x-0.90x-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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