2x+x+8=20

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Solution for 2x+x+8=20 equation: 



2x+x+8=20

We move all terms to the left:

2x+x+8-(20)=0

We add all the numbers together, and all the variables

3x-12=0

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

3x=12

x=12/3

x=4

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