nilai p+q+r adalah.......

5r - 8 = 7
5r = 7 + 8
5r = 15
r = 3

5s - (-3) = 8
5s + 3 = 8
5s = 8 - 3
5s = 5
s = 1

5p - 5 = -15
5p = -15 + 5
5p = -10
p = -2

5q - 6 = 14
5q = 14 + 6
5q = 20
q = 4
SEMOGA MEMBANTU