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8x-4+8x-4=15x-4
We move all terms to the left:
8x-4+8x-4-(15x-4)=0
We add all the numbers together, and all the variables
16x-(15x-4)-8=0
We get rid of parentheses
16x-15x+4-8=0
We add all the numbers together, and all the variables
x-4=0
We move all terms containing x to the left, all other terms to the right
x=4
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