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12x+30-5x=38+5x
We move all terms to the left:
12x+30-5x-(38+5x)=0
We add all the numbers together, and all the variables
12x-5x-(5x+38)+30=0
We add all the numbers together, and all the variables
7x-(5x+38)+30=0
We get rid of parentheses
7x-5x-38+30=0
We add all the numbers together, and all the variables
2x-8=0
We move all terms containing x to the left, all other terms to the right
2x=8
x=8/2
x=4
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