x+(x+-30)=180

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Solution for x+(x+-30)=180 equation: 



x+(x+-30)=180

We move all terms to the left:

x+(x+-30)-(180)=0

We add all the numbers together, and all the variables

x+(x-30)-180=0

We get rid of parentheses

x+x-30-180=0

We add all the numbers together, and all the variables

2x-210=0

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

2x=210

x=210/2

x=105

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