x+(x-4)=320

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Solution for x+(x-4)=320 equation: 



x+(x-4)=320

We move all terms to the left:

x+(x-4)-(320)=0

We get rid of parentheses

x+x-4-320=0

We add all the numbers together, and all the variables

2x-324=0

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

2x=324

x=324/2

x=162

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