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3x-30=15x-5
We move all terms to the left:
3x-30-(15x-5)=0
We get rid of parentheses
3x-15x+5-30=0
We add all the numbers together, and all the variables
-12x-25=0
We move all terms containing x to the left, all other terms to the right
-12x=25
x=25/-12
x=-2+1/12
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