Metode substitusi x-2y=-5 dan 4x-5y=0

Mapel : Matematika
Materi : persamaan linier
Jawaban :

x - 2y = - 5
x = 2y - 5

Substitusi x = 2y - 5 ke persamaan 2

4x - 5y = 0
4(2y - 5) - 5y = 0
8y - 20 - 5y = 0
3y = 20
y = 20/3

x = 2y - 5
x = 40/3 - 5
x = 25/3

HP = {25/3, 20/3}

Semoga membantu...

x - 2y = - 5
x = 2y - 5

4x - 5y = 0
4(2y - 5) - 5y = 0
8y - 20 - 5y = 0
3y = 20
y = 20/3

x = 2y - 5
x = 2(20/3) - 5
x = 40/3 - 5
x = 40/3 - 15/3
x = 25/3