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(3+x)12=4
We move all terms to the left:
(3+x)12-(4)=0
We add all the numbers together, and all the variables
(x+3)12-4=0
We multiply parentheses
12x+36-4=0
We add all the numbers together, and all the variables
12x+32=0
We move all terms containing x to the left, all other terms to the right
12x=-32
x=-32/12
x=-2+2/3
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