Question

resolva o sistema usando a regra de cramer { x+2y=5 {2x-3y=3

Answer 1

x + 2y = 5
2x - 3y = 3
==========

D
| 1 ..2|
| 2 -3|

-3 - 4 = -7


Dx
| 5 .2|
| 3 -3|

-15 - 6 = -21


Dy
| 1 .5|
| 2 3|

3 - 10 = -7


X = Dx/D

X = -21/-7
X = 3


Y = Dy/D

Y = -7/-7
Y = 1


s={ 3, 1 }