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81-2(x-1)*2=51
We move all terms to the left:
81-2(x-1)*2-(51)=0
We add all the numbers together, and all the variables
-2(x-1)*2+30=0
We multiply parentheses
-4x+4+30=0
We add all the numbers together, and all the variables
-4x+34=0
We move all terms containing x to the left, all other terms to the right
-4x=-34
x=-34/-4
x=8+1/2
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