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8+9p=13+7p
We move all terms to the left:
8+9p-(13+7p)=0
We add all the numbers together, and all the variables
9p-(7p+13)+8=0
We get rid of parentheses
9p-7p-13+8=0
We add all the numbers together, and all the variables
2p-5=0
We move all terms containing p to the left, all other terms to the right
2p=5
p=5/2
p=2+1/2
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