First, set up the equation you are given: 15 - 2p = 9
Subtract 15 from each side of the equation: 15 -2p - 15 = 9-15
Then, you should have: -2p = -6
Divide each side by -2: (-2p)/(-2) = (-6/-2)
Solve for p: p = 3
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p = 5
Without prior knowledge of the value of q or r, it is impossible to calculate the answer to this equation.
P - - p = 2p
That depends what the value of p is.
p = 4