Question

metodo da substituiçao
3x - 2y = 7
x + 3y = -16

Answer 1

{3x-2y=7
{x= -16-3y

3(-16-3y)-2y=7
-48 -9y -2y =7
-11y= 7 + 48
-11y= 55 (-1)
11y= -55
y= -55/11
y= -5

x= -16 -3y
x= -16 -3 x (-5)
x= -16 + 15
x= -1

S={(-1,-5)}