Tolong bantu jawab sekalian caranya besok kumpul

• nilai p
2 + p = 3p - 4
3p - p = 2 + 4
2p = 6
p = 6/2
p = 3

• nilai q
2p + q = -1
2(3) + q = -1
6 + q = -1
q = -1 - 6
q = -7

• nilai r
2p + 6r = 3q + 3
2(3) + 6r = 3(-7) + 3
6 + 6r = -21 + 3
6 + 6r = -18
6r = -18 - 6
6r = -24
r = -24/6
r = -4

• nilai s
s + 1 = 2r - 9
s + 1 = 2(-4) - 9
s + 1 = -8 - 9
s + 1 = -17
s = -17 - 1
s = -18

• nilai t
r + q = 6s + t
-4 + (-7) = 6(-18) + t
-11 = -108 + t
t = -11 + 108
t = 97

• nilai u
9 + 2p = u
9 + 2(3) = u
9 + 6 = u
15 = u
u = 15