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150=6x+20
We move all terms to the left:
150-(6x+20)=0
We get rid of parentheses
-6x-20+150=0
We add all the numbers together, and all the variables
-6x+130=0
We move all terms containing x to the left, all other terms to the right
-6x=-130
x=-130/-6
x=21+2/3
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