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30-8x=20-3x
We move all terms to the left:
30-8x-(20-3x)=0
We add all the numbers together, and all the variables
-8x-(-3x+20)+30=0
We get rid of parentheses
-8x+3x-20+30=0
We add all the numbers together, and all the variables
-5x+10=0
We move all terms containing x to the left, all other terms to the right
-5x=-10
x=-10/-5
x=+2
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