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15x-7=4x+28
We move all terms to the left:
15x-7-(4x+28)=0
We get rid of parentheses
15x-4x-28-7=0
We add all the numbers together, and all the variables
11x-35=0
We move all terms containing x to the left, all other terms to the right
11x=35
x=35/11
x=3+2/11
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