-x-12x=216

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Solution for -x-12x=216 equation:



-x-12x=216
We move all terms to the left:
-x-12x-(216)=0
We add all the numbers together, and all the variables
-13x-216=0
We move all terms containing x to the left, all other terms to the right
-13x=216
x=216/-13
x=-16+8/13

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