buat lah contoh soal matematika spldv 2 variabel beserta jawabannya

1. x + y = 25 x - y = 5
= x = 25 - y = y = 25 - y - y = 5
x = 25 - 10 -2y = 5 - 25
x = 15 -2y = -20
y = 10

2. 2x - y = -6 3x + 4y = 13
= -y = -6 - 2x (:-1) = 3x + 4 ( 6 + 2x ) = 13
y = 6 + 2x 3x + 24 + 8x = 1
y = 6 + 2 × -1 11x = 13 - 24
y = 6 + (-2) 11x = -11
y = 4 x = -1