3(p+q) = p
First we want to break apart the brackets. The 3 can be distributed as a coefficient to p and q .
3p + 3q = 1p
Next we want to isolate the variable p to a single side of the equation
3p + 3q - 3p = 1p - 3p
Simplifying the equation, we get
3q = -2p
Isolating for p, we get: 3q/-2 = p
This answer corresponds to answer D.