Question

como resuelvo esta ecuación 2x + y = -10 2 – 3y = 2

Answer 1

2x+y=-10.............(1)

2x-3y=2..............(2)

(1)-(2):

2x-2x + y - -3y = -10-2

y+3y=-12

4y=-12

y=-3

"y" en (1):

2x + -3 = -10

2x -3 = -10

2x = -10 + 3

x = -7/2

x = -3,5