-4x+(-12)+21=15-5x

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Solution for -4x+(-12)+21=15-5x equation: 



-4x+(-12)+21=15-5x

We move all terms to the left:

-4x+(-12)+21-(15-5x)=0

We add all the numbers together, and all the variables

-4x-(-5x+15)+21+(-12)=0

We add all the numbers together, and all the variables

-4x-(-5x+15)+9=0

We get rid of parentheses

-4x+5x-15+9=0

We add all the numbers together, and all the variables

x-6=0

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

x=6

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