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3x+30=5x-13
We move all terms to the left:
3x+30-(5x-13)=0
We get rid of parentheses
3x-5x+13+30=0
We add all the numbers together, and all the variables
-2x+43=0
We move all terms containing x to the left, all other terms to the right
-2x=-43
x=-43/-2
x=21+1/2
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