Tentukan nilai X dan y! 2x - 3y = 4 x + 4y = 13

Bab Persamaan Linear
Matematika SMP Kelas VIII

x + 4y = 13
x = 13 - 4y

2x - 3y = 4
2 (13 - 4y) - 3y = 4
26 - 8y - 3y = 4
-11y = 4 - 26
y = -22/-11
y = 2

x = 13 - 4y
x = 13 - 4 . 2
x = 13 - 8
x = 5

jadi, x = 5 dan y = 2

Mapel : Matematika
Kelas : VIII SMP
Bab : SPLDV

Pembahasan :
2x - 3y = 4
2x + 8y = 26
——————— (-)
11y = 22
y = 2

Substitusi...
2x - 3y = 4
2x - 3(2) = 4
2x = 4 + 6
2x = 10
x = 5

Hp : {x , y} = {5 , 2}