3x+40+x=80

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Solution for 3x+40+x=80 equation: 



3x+40+x=80

We move all terms to the left:

3x+40+x-(80)=0

We add all the numbers together, and all the variables

4x-40=0

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

4x=40

x=40/4

x=10

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