3x-8=-x+40

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Solution for 3x-8=-x+40 equation: 



3x-8=-x+40

We move all terms to the left:

3x-8-(-x+40)=0

We add all the numbers together, and all the variables

3x-(-1x+40)-8=0

We get rid of parentheses

3x+1x-40-8=0

We add all the numbers together, and all the variables

4x-48=0

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

4x=48

x=48/4

x=12

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