p = 3 q = -2 r = -1 q/2 + 2(3r -qp)

To solve this, simply substitute the values in the expression: $$ \frac{q}{2}+2\left(3r-qp\right) $$ $$ =\frac{\left(-2\right)}{2}+2\lbrack3\left(-1\right)-\left(-2\right)\left(3\right)\rbrack $$ Evaluate the expression $$ =-1+2\lbrack\left(-3\right)-\left(-6\right)\rbrack $$ $$ =-1+2\left(-3+6\right) $$ $$ =-1+2\left(3\right) $$ $$ =-1+6 $$ $$ =5 $$ ANSWER: 5