substitusi dsri 2x +3y =50000 dan 5x +4y = 90000

SPLDV

2x + 3y = 50000
2x = 50000 - 3y
x = 25000 - 1,5y

5x + 4y = 90000
125000 - 7,5y + 4y = 90000
125000 - 3,5y = 90000
3,5y = 125000 - 90000
3,5y = 35000
y = 10000

Substitusikan nilai y ke pers.1
2x + 3y = 50000
2x + 30000 = 50000
2x = 20000
x = 10000

HP: {10000, 10000}