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3.5x-2.5x-4=18*
We move all terms to the left:
3.5x-2.5x-4-(18*)=0
We add all the numbers together, and all the variables
3.5x-2.5x-4-0=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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