21=-1x=36

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Solution for 21=-1x=36 equation: 



21=-1x=36

We move all terms to the left:

21-(-1x)=0

We get rid of parentheses

1x+21=0

We add all the numbers together, and all the variables

x+21=0

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

x=-21

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