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2x - 5y = 15 I3I 6x - 15y = 45
3x + 4y = 11 I2I 6x + 8y = 22 _ eliminasikan
- 23y = 23
y = 23/-23
y = -1
subtitusikan
2x -5y = 15
2x -5(-1) = 15
2x + 5 = 15
2x = 15- 5
2x = 10
x = 10/2
x = 5
maka HP = { x , y }
= { 5 , -1}
---- selesia ---- semoga membantu
3x + 4y = 11
Eliminasi :
2x - 5y = 15 |x 4| ⇒ 8x - 20y = 60
3x + 4y = 11 |x 5| ⇒ 15x + 20y = 55
8x - 20y = 60
15x + 20y = 55 +
23x = 115
x = 115/23 = 5
Subsitusi x = 5 ke persamaan (1)
2x - 5y = 15
2(5) - 5y = 15
10 - 5y = 15
5y = 10 - 15
5y = - 5
y = - 1
Maka HP = {(5, - 1) }