Question

Simplify 2p - 5q +7r -4p +2q - 3r, and find the value of the expression when p = 1 / 2 , q = - 1 / 3 and r = 4. *

Answer 1

1. Answer:
2. \left. \begin{array} { l } { p = \frac{1}{2} }\\ { q = -\frac{1}{3} }\\ { r = 4 }\\ { \text{Solve for } s \text{ where} } \\ { s = 2 p - 5 q + 7 r - 4 p + 2 q - 3 r } \end{array} \right.s=2\times \left(\frac{1}{2}\right)-5\left(-\frac{1}{3}\right)+7\times 4-4\times \left(\frac{1}{2}\right)+2\left(-\frac{1}{3}\right)-3\times 4