12x=81+9

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Solution for 12x=81+9 equation: 



12x=81+9

We move all terms to the left:

12x-(81+9)=0

We add all the numbers together, and all the variables

12x-90=0

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

12x=90

x=90/12

x=7+1/2

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