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-50-2x=3x+100
We move all terms to the left:
-50-2x-(3x+100)=0
We get rid of parentheses
-2x-3x-100-50=0
We add all the numbers together, and all the variables
-5x-150=0
We move all terms containing x to the left, all other terms to the right
-5x=150
x=150/-5
x=-30
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