3x+(x-4)=20

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Solution for 3x+(x-4)=20 equation: 



3x+(x-4)=20

We move all terms to the left:

3x+(x-4)-(20)=0

We get rid of parentheses

3x+x-4-20=0

We add all the numbers together, and all the variables

4x-24=0

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

4x=24

x=24/4

x=6

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