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x-3(1+2x)=8
We move all terms to the left:
x-3(1+2x)-(8)=0
We add all the numbers together, and all the variables
x-3(2x+1)-8=0
We multiply parentheses
x-6x-3-8=0
We add all the numbers together, and all the variables
-5x-11=0
We move all terms containing x to the left, all other terms to the right
-5x=11
x=11/-5
x=-2+1/5
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