3x+8=-x+20

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Solution for 3x+8=-x+20 equation: 



3x+8=-x+20

We move all terms to the left:

3x+8-(-x+20)=0

We add all the numbers together, and all the variables

3x-(-1x+20)+8=0

We get rid of parentheses

3x+1x-20+8=0

We add all the numbers together, and all the variables

4x-12=0

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

4x=12

x=12/4

x=3

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