contestada

solve this system of linear equations. separate the x-and y-values with a comma.
-2x=8-6y
-15x=21-6y

Respuesta :

Answer:

(x,y)=-(1,1)

Step-by-step explanation:

-2x=8-6y (divide by -2)

=> x=-4+3y

-15x=21-6y (divide by -3 for simplicity)

=>5x=-7+2y

We know that  x=-4+3y, insert this into expression "5x=-7+2y"

5(-4+3y)=-7+2y

-20+15y=-7+2y

15y-2y=20-7

13y=13

y=1

Since x=-4+3y we can find x by using y=-1

x=-4+3(1)

x=-1

Otras preguntas