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