Question

x-2y=10;2x+3y=-8 por Determinantes

Answer 1

∆x=(10)(3)-(-8(-10)=30-16=14

∆y= (1)(-8)-(2)(10)=-8-20=-28

∆=(1)(3)-(2)(-2)=3+4=7

X=∆X/∆=14/7=+2
Y=∆Y/∆=-28/7=4


Comprobación
X-2Y=10
X=+2
Y=-4

(+2)-2(-4)=10
2+8=10
10=10