X-(320-x)=20

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Solution for X-(320-x)=20 equation: 



X-(320-X)=20

We move all terms to the left:

X-(320-X)-(20)=0

We add all the numbers together, and all the variables

X-(-1X+320)-20=0

We get rid of parentheses

X+1X-320-20=0

We add all the numbers together, and all the variables

2X-340=0

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

2X=340

X=340/2

X=170

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