Question

Resolva os sistemas lineares: Regra ESCALON ou CRAMER
a) 2x-3y=-5. b)3x-2y=5
X+2y=8. 2x+y=1

Answer 1

A) 2x - 3y= -5
X + 2y= 8 (-2)
2x - 3y = -5
-2x - 4y = -16
0 -7y = -21
Y= -21/7 --> y= 3
* 2x - 3y= -5
2x - 3•3= -5
2x= -5 +9
X= 4/ 2 --> x= 2
S (2,3)


B) 3x-2y=5
2x +y= 2 (2) --> 4x +2y = 2

3x -2y = 5
4x +2y= 2
7x = 7
X= 1

3•1 -2y = 5
-2y = -2
Y= -2/-2
Y = 1

S (1, 1)