-21+7x-3x=27

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Solution for -21+7x-3x=27 equation: 



-21+7x-3x=27

We move all terms to the left:

-21+7x-3x-(27)=0

We add all the numbers together, and all the variables

4x-48=0

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

4x=48

x=48/4

x=12

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