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1/4p+2/5p-1/2p=-9/20
We move all terms to the left:
1/4p+2/5p-1/2p-(-9/20)=0
Domain of the equation: 4p!=0
p!=0/4
p!=0
p∈R
Domain of the equation: 5p!=0
p!=0/5
p!=0
p∈R
Domain of the equation: 2p!=0We get rid of parentheses
p!=0/2
p!=0
p∈R
1/4p+2/5p-1/2p+9/20=0
We calculate fractions
We do not support eppression: p^3
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