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15x=513x+5
We move all terms to the left:
15x-(513x+5)=0
We get rid of parentheses
15x-513x-5=0
We add all the numbers together, and all the variables
-498x-5=0
We move all terms containing x to the left, all other terms to the right
-498x=5
x=5/-498
x=-5/498
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