8x+3x-13+12=21

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Solution for 8x+3x-13+12=21 equation: 



8x+3x-13+12=21

We move all terms to the left:

8x+3x-13+12-(21)=0

We add all the numbers together, and all the variables

11x-22=0

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

11x=22

x=22/11

x=2

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