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158=8+30x
We move all terms to the left:
158-(8+30x)=0
We add all the numbers together, and all the variables
-(30x+8)+158=0
We get rid of parentheses
-30x-8+158=0
We add all the numbers together, and all the variables
-30x+150=0
We move all terms containing x to the left, all other terms to the right
-30x=-150
x=-150/-30
x=+5
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