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(100-p)+(80-p/2)=50
We move all terms to the left:
(100-p)+(80-p/2)-(50)=0
We add all the numbers together, and all the variables
(-1p+100)+(-p/2+80)-50=0
We get rid of parentheses
-1p-p/2+100+80-50=0
We multiply all the terms by the denominator
-1p*2-p+100*2+80*2-50*2=0
We add all the numbers together, and all the variables
-1p-1p*2+260=0
Wy multiply elements
-1p-2p+260=0
We add all the numbers together, and all the variables
-3p+260=0
We move all terms containing p to the left, all other terms to the right
-3p=-260
p=-260/-3
p=86+2/3
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