(-12+x+7)+(-12+x+7)+(-12+x+7)=45

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Solution for (-12+x+7)+(-12+x+7)+(-12+x+7)=45 equation: 



(-12+x+7)+(-12+x+7)+(-12+x+7)=45

We move all terms to the left:

(-12+x+7)+(-12+x+7)+(-12+x+7)-(45)=0

We add all the numbers together, and all the variables

(x-5)+(x-5)+(x-5)-45=0

We get rid of parentheses

x+x+x-5-5-5-45=0

We add all the numbers together, and all the variables

3x-60=0

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

3x=60

x=60/3

x=20

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