Question

resolva os sistemas de equações

2x-3y=-16
5x+3y=2

Answer 1

{2x-3y=-16
{5x+3y=2
7x=-14
x=-14/7
x=-2
5x+3y=2
5.(-2)+3y=2
-10+3y=3
3y=3+10
3y=13
y=13/3
S={-2 ; 13/3}

Answer 2

{2x - 3y = -16
{5x + 3y = 2
———————
7x. = -14
x = -14
——
7
x. = -2

5x + 3y = 2
5. (-2) + 3y = 2
-10 + 3y = 2
3y = 2 + 10
3y = -12
y = -12
——
7
y = -4