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30(50-x)-5x=450
We move all terms to the left:
30(50-x)-5x-(450)=0
We add all the numbers together, and all the variables
30(-1x+50)-5x-450=0
We add all the numbers together, and all the variables
-5x+30(-1x+50)-450=0
We multiply parentheses
-5x-30x+1500-450=0
We add all the numbers together, and all the variables
-35x+1050=0
We move all terms containing x to the left, all other terms to the right
-35x=-1050
x=-1050/-35
x=+30
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