-3x+7x-3=-21

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



-3x+7x-3=-21

We move all terms to the left:

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

We add all the numbers together, and all the variables

4x+18=0

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

4x=-18

x=-18/4

x=-4+1/2

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