5x-8+7x=21

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Solution for 5x-8+7x=21 equation: 



5x-8+7x=21

We move all terms to the left:

5x-8+7x-(21)=0

We add all the numbers together, and all the variables

12x-29=0

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

12x=29

x=29/12

x=2+5/12

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