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30+2x=30+4x
We move all terms to the left:
30+2x-(30+4x)=0
We add all the numbers together, and all the variables
2x-(4x+30)+30=0
We get rid of parentheses
2x-4x-30+30=0
We add all the numbers together, and all the variables
-2x=0
x=0/-2
x=0
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