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28+x=-20-5x
We move all terms to the left:
28+x-(-20-5x)=0
We add all the numbers together, and all the variables
x-(-5x-20)+28=0
We get rid of parentheses
x+5x+20+28=0
We add all the numbers together, and all the variables
6x+48=0
We move all terms containing x to the left, all other terms to the right
6x=-48
x=-48/6
x=-8
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