(X-12)+(3x-12)+(3x-12)=87

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Solution for (X-12)+(3x-12)+(3x-12)=87 equation: 



(X-12)+(3X-12)+(3X-12)=87

We move all terms to the left:

(X-12)+(3X-12)+(3X-12)-(87)=0

We get rid of parentheses

X+3X+3X-12-12-12-87=0

We add all the numbers together, and all the variables

7X-123=0

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

7X=123

X=123/7

X=17+4/7

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