2*x+5*x=80

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Solution for 2*x+5*x=80 equation: 



2x+5x=80

We move all terms to the left:

2x+5x-(80)=0

We add all the numbers together, and all the variables

7x-80=0

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

7x=80

x=80/7

x=11+3/7

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