Question

3x+2y=8. x + 3y=-9 ayuda ​

Answer 1

Solución:

3x+2y=9 ... (1)

x+3y= -9 ... (2)

x= -9-3y ⇒ x= -9-3y(-5) = -9 +15

3x=8-2y

x= $\frac{8-2y}{3}$

-9-3y=    $\frac{8-2y}{3}$

-27-9y=8-2y

-27-8y=-24+9y

-35=7y

-5=y