-x-21=5x+15

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Solution for -x-21=5x+15 equation: 



-x-21=5x+15

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1x-(5x+15)-21=0

We get rid of parentheses

-1x-5x-15-21=0

We add all the numbers together, and all the variables

-6x-36=0

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

-6x=36

x=36/-6

x=-6

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