(jawab di follow)Hp dari -x + 5y = 10, 2x - 3y = 5. tentukan nilai dari X + Y? #hrus lengkap.

- x + 5y = 10 |×2
2x + 3y = 5

- 2x + 10y = 20
2x + 3y = 5
-----------------------(+)
13y = 25
y = 25/13

- x + 5y = 10
- x + 5(25/13) = 10
- x + 125/13 = 10
- x = 10 - 125/13 (dikali 13)
- 13x = 130 - 125
- 13x = 5
x = - 5/13

hp = {-5/13 , 25/13}

x + y
= - 5/13 + 25/13
= 20/13
= 1 7/13