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6x+30=15x-13
We move all terms to the left:
6x+30-(15x-13)=0
We get rid of parentheses
6x-15x+13+30=0
We add all the numbers together, and all the variables
-9x+43=0
We move all terms containing x to the left, all other terms to the right
-9x=-43
x=-43/-9
x=4+7/9
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