Question

Socorro
2x-y=4
X+2y=7

Cálculo porfavor????

Answer 1

{2X - Y = 4..(2)
{X + 2Y = 7

4X - 2Y = 8
..X + 2Y = 7
_________
5X ........= 15

X = 15
......___
........5

X = 3


2X - Y = 4

2(3) - Y = 4

6 - Y = 4

- Y = 4 - 6

- Y = - 2..(-1)

Y = 2