Question

Selesaikan persamaan linear serentak berikut. 2x + y = -5 3x - 4y = 9

Answer 1

Answer:

(-1;-3)

Step-by-step explanation:

$\left \{ {{4(2x+y)=4*(-5)} \atop {3x-4y=9}} \right. \ => \ \left \{ {{8x+4y=-20} \atop {3x-4y=9}} \right. \ => \ \left \{ {{11x=-11} \atop {2x+y=-5}} \right. \ => \ \left \{ {{x=-1} \atop {y=-3}} \right.$