Matriks tolong jwb yaa

p -2s = 1, ==» p = 2s+ 1 ....1)
q - r = -1, ==» q = r - 1. .......2)
2r - q = -1. sub...2
2r - (r-1) = -1
2r - r + 1 = -1
r = -2.
dari...2) ==» q = r-1, didapat q= -2 -1 = -3
s - 2P = 1, sub....1)
S - 2(2s +1) = 1
s - 4s -2 = 1
-3s = 3
s = -1
dari...1), p= 2s+1, ==» p = 2.-1 +1, maka p = -1
p + q + r + S = -1 + -3 + -2 + -1 = -7