Question

ecuacion lineal metodo de sustitucion x+2y=1 -3x+y=-10

Answer 1

Respuesta:

x+2y=1 ________x=1-2y =1-2(-1)=1+2=3

-3x+y=-10

-3(1-2y)+y = -10

-3+6y+y=-10

7y= -10+3

y=-7/7

y=-1

x=3