27-x=21-4x

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Solution for 27-x=21-4x equation: 



27-x=21-4x

We move all terms to the left:

27-x-(21-4x)=0

We add all the numbers together, and all the variables

-x-(-4x+21)+27=0

We add all the numbers together, and all the variables

-1x-(-4x+21)+27=0

We get rid of parentheses

-1x+4x-21+27=0

We add all the numbers together, and all the variables

3x+6=0

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

3x=-6

x=-6/3

x=-2

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