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3(3-4x)=105
We move all terms to the left:
3(3-4x)-(105)=0
We add all the numbers together, and all the variables
3(-4x+3)-105=0
We multiply parentheses
-12x+9-105=0
We add all the numbers together, and all the variables
-12x-96=0
We move all terms containing x to the left, all other terms to the right
-12x=96
x=96/-12
x=-8
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