Question

Tolong ya,,poinnya 20
cara mengerjakannya pake cara eliminasi dan substitusi dari PSLDV -6x+8y=-10 dan 7x+6y=0

Answer 1

Verified answer

- 6x + 8y = - 10 |×3
7x + 6y = 0 |×4

- 18x + 24y = - 30
28x + 24y = 0
---------------------------(-)
- 46x = - 30
x = 30/46
x = 15/23

- 6x + 8y = - 10
- 6(15/23) + 8y = - 10
- 90/23 + 8y = - 10 (dikalikan 23 utk menghilangkan penyebut)
- 90 + 184y = - 230
184y = - 230 + 90
184y = - 140
y = - 140/184
y = - 35/46

hp = {15/23 , - 35/46}