4x-(80-x)=120

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Solution for 4x-(80-x)=120 equation: 



4x-(80-x)=120

We move all terms to the left:

4x-(80-x)-(120)=0

We add all the numbers together, and all the variables

4x-(-1x+80)-120=0

We get rid of parentheses

4x+1x-80-120=0

We add all the numbers together, and all the variables

5x-200=0

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

5x=200

x=200/5

x=40

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