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9x-10(12-9x/10)=-12
We move all terms to the left:
9x-10(12-9x/10)-(-12)=0
We add all the numbers together, and all the variables
9x-10(-9x/10+12)-(-12)=0
We add all the numbers together, and all the variables
9x-10(-9x/10+12)+12=0
We multiply parentheses
9x+90x-120+12=0
We add all the numbers together, and all the variables
99x-108=0
We move all terms containing x to the left, all other terms to the right
99x=108
x=108/99
x=1+1/11
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