180=90+x.x

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Solution for 180=90+x.x equation: 



180=90+x.x

We move all terms to the left:

180-(90+x.x)=0

We add all the numbers together, and all the variables

-(x.x+90)+180=0

We get rid of parentheses

-x.x-90+180=0

We add all the numbers together, and all the variables

-x.x+90=0

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

-x.x=-90

x=-90/1

x=-90

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