tentukan substitusi dari 2x+3y=110 x+2y=65

x + 2y = 65
x = - 2y + 65
subtitusi ke pers :
2x + 3y = 110
2(-2y + 65) + 3y = 110
- 4y + 130 + 3y = 110
- y = 110 - 130
- y = - 20
y = 20
subtitusi ke pers :
x = - 2y + 65
x = - 2(20) + 65
x = - 40 + 65
x = 25
hp = ( 25, 20)