-x+6=4x+21

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Solution for -x+6=4x+21 equation: 



-x+6=4x+21

We move all terms to the left:

-x+6-(4x+21)=0

We add all the numbers together, and all the variables

-1x-(4x+21)+6=0

We get rid of parentheses

-1x-4x-21+6=0

We add all the numbers together, and all the variables

-5x-15=0

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

-5x=15

x=15/-5

x=-3

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