x+3x+8=80

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Solution for x+3x+8=80 equation: 



x+3x+8=80

We move all terms to the left:

x+3x+8-(80)=0

We add all the numbers together, and all the variables

4x-72=0

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

4x=72

x=72/4

x=18

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