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30=-20x-48
We move all terms to the left:
30-(-20x-48)=0
We get rid of parentheses
20x+48+30=0
We add all the numbers together, and all the variables
20x+78=0
We move all terms containing x to the left, all other terms to the right
20x=-78
x=-78/20
x=-3+9/10
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