81-2x=90-3x

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Solution for 81-2x=90-3x equation: 



81-2x=90-3x

We move all terms to the left:

81-2x-(90-3x)=0

We add all the numbers together, and all the variables

-2x-(-3x+90)+81=0

We get rid of parentheses

-2x+3x-90+81=0

We add all the numbers together, and all the variables

x-9=0

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

x=9

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