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12-2(x-1)=4
We move all terms to the left:
12-2(x-1)-(4)=0
We add all the numbers together, and all the variables
-2(x-1)+8=0
We multiply parentheses
-2x+2+8=0
We add all the numbers together, and all the variables
-2x+10=0
We move all terms containing x to the left, all other terms to the right
-2x=-10
x=-10/-2
x=+5
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