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6(3+p)=42
We move all terms to the left:
6(3+p)-(42)=0
We add all the numbers together, and all the variables
6(p+3)-42=0
We multiply parentheses
6p+18-42=0
We add all the numbers together, and all the variables
6p-24=0
We move all terms containing p to the left, all other terms to the right
6p=24
p=24/6
p=4
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