Dik sistem persamaan x-3y-5=0 dan2x-5y=9 .nilai dari 3x+2y=…

  x – 3y = 5 l x2 l
2x – 5y = 9 l x1 l

2x – 6y = 10
2x – 5y =   9
—————— –
       -y = -1
        y = 1

Substitusi ke x – 3y = 5
x – 3y = 5
x – 3.1 = 5
x – 3 = 5
     x = 5 + 3
     x = 8

Masukkan ke 3x + 2y
3x + 2y
= 3.6 + 2.1
=18 + 2
= 20