Question

Calcule a soluçao (x,y) de cada sistema
A-)x = -3
X.y= -7

B-)2x-y=15
Y= -3

Answer 1

A) x = -3 ; xy = -7
-3y = -7
y = 7/3

S = { (-3,7/3) }

B) 2x - y = 15 ; y = -3
2x + 3 = 15
2x = 12
x = 6

S = { (6, -3) }