5x+7x=80

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Solution for 5x+7x=80 equation: 



5x+7x=80

We move all terms to the left:

5x+7x-(80)=0

We add all the numbers together, and all the variables

12x-80=0

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

12x=80

x=80/12

x=6+2/3

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