21=36-x/80

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Solution for 21=36-x/80 equation: 



21=36-x/80

We move all terms to the left:

21-(36-x/80)=0

We add all the numbers together, and all the variables

-(-x/80+36)+21=0

We get rid of parentheses

x/80-36+21=0

We multiply all the terms by the denominator


x-36*80+21*80=0

We add all the numbers together, and all the variables

x-1200=0

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

x=1200

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