Jika x dan y memenuhi sistem persamaan 5x - 3y = 20 dan 3x - 5y = -4, maka 6x - 4y =

5x-3y =20 ⇒ ×3
3x-5y=-4 ⇒ x5

15x - 9y = 60
15 x - 25 y = -20 _
16 y = 80
y= [tex] \frac{80}{16} [/tex]
y= 5

5x-3y = 20
5x - 3(5) = 20
5x- 15 = 20
5x = 20+15
5x = 35
x= [tex] \frac{35}{5}[/tex] = 7

6x-4y =....
6(7) - 4(5)
42- 20 = 22