Question

solve: 2x-3y = 12 ; x + 2y + 1 = 0
using cross multiplycation​

Answer 1

Answer:

Solution :

x+2y+1=0

2x−3y−12=0

Solving these two equations with cross-multiplication method,

x−24+3=y2−(−12)=1−3−4

⇒x−21=−17⇒x=3

⇒y14=−17⇒y=−2

Answer 2

Answer:

x=3, y = -2

Step-by-step explanation:

x+2y+1=0.....(1)

2x-3y-12=0.....(2)

by cross multiplication

x/(2* (-12)*(-1)*3). =. Y/(1*2-1*(-12)). = 1/(1*(-3)*(-2)*2)

x/(-21). = y/14. =. 1/(-7)

x = -21/-7. =3, y.=14/-7. =. -2