3x-7x+5=21

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Solution for 3x-7x+5=21 equation: 



3x-7x+5=21

We move all terms to the left:

3x-7x+5-(21)=0

We add all the numbers together, and all the variables

-4x-16=0

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

-4x=16

x=16/-4

x=-4

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