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3x+8x-4=2x+4
We move all terms to the left:
3x+8x-4-(2x+4)=0
We add all the numbers together, and all the variables
11x-(2x+4)-4=0
We get rid of parentheses
11x-2x-4-4=0
We add all the numbers together, and all the variables
9x-8=0
We move all terms containing x to the left, all other terms to the right
9x=8
x=8/9
x=8/9
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