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4000=50x+20x/2
We move all terms to the left:
4000-(50x+20x/2)=0
We add all the numbers together, and all the variables
-(+50x+20x/2)+4000=0
We get rid of parentheses
-50x-20x/2+4000=0
We multiply all the terms by the denominator
-50x*2-20x+4000*2=0
We add all the numbers together, and all the variables
-20x-50x*2+8000=0
Wy multiply elements
-20x-100x+8000=0
We add all the numbers together, and all the variables
-120x+8000=0
We move all terms containing x to the left, all other terms to the right
-120x=-8000
x=-8000/-120
x=66+2/3
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