x+12+x-30=180

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Solution for x+12+x-30=180 equation: 



x+12+x-30=180

We move all terms to the left:

x+12+x-30-(180)=0

We add all the numbers together, and all the variables

2x-198=0

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

2x=198

x=198/2

x=99

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