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30=20-6x
We move all terms to the left:
30-(20-6x)=0
We add all the numbers together, and all the variables
-(-6x+20)+30=0
We get rid of parentheses
6x-20+30=0
We add all the numbers together, and all the variables
6x+10=0
We move all terms containing x to the left, all other terms to the right
6x=-10
x=-10/6
x=-1+2/3
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