Persamaan 2p+3q =2 dan 4p-q=18nilai 5p-2q

2p + 3q = 2 |2x| -----> 4p + 6q = 4
4p - q = 18 |1x| -----> 4p - q = 18
----------------- -
7q = -14
q = -2


4p - q = 18
4p - (-2) = 18
4p +2 = 18
4p = 18-2
4p = 16
p = 16/4 = 4


nila 5p-2q
5.4 - 2.(-2)
20 - (-4)
= 24