Tentukan SPLDV dari: 1.) 2x+3y = 12 x+4y = 11 2.) 4x-5y = -6 x+2y = 3 SPLDV yang digunakan : 1. metode eliminasi 2. metode substitusi 3. metode gabungan eliminasi dan substitusi. 4. metode grafik 5. metode determinan matriks
crosboness
1. metode eliminasi 1.) 2x+3y = 12 |×1| 2x+3y = 12 x+4y = 11 |×2| 2x+8y = 22 ___________- -5y = -10 y = -10/-5 y = 2
1.) 2x+3y = 12 |×1| 2x+3y = 12
x+4y = 11 |×2| 2x+8y = 22
___________-
-5y = -10
y = -10/-5
y = 2
2x+3y = 12
2x+3(2) = 12
2x+6 = 12
2x = 12-6
x = 6