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3(8+2p)=42
We move all terms to the left:
3(8+2p)-(42)=0
We add all the numbers together, and all the variables
3(2p+8)-42=0
We multiply parentheses
6p+24-42=0
We add all the numbers together, and all the variables
6p-18=0
We move all terms containing p to the left, all other terms to the right
6p=18
p=18/6
p=3
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