18-(8-x)=21

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Solution for 18-(8-x)=21 equation: 



18-(8-x)=21

We move all terms to the left:

18-(8-x)-(21)=0

We add all the numbers together, and all the variables

-(-1x+8)+18-21=0

We add all the numbers together, and all the variables

-(-1x+8)-3=0

We get rid of parentheses

1x-8-3=0

We add all the numbers together, and all the variables

x-11=0

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

x=11

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