3x+7+x=20

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Solution for 3x+7+x=20 equation: 



3x+7+x=20

We move all terms to the left:

3x+7+x-(20)=0

We add all the numbers together, and all the variables

4x-13=0

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

4x=13

x=13/4

x=3+1/4

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