Question

*2x + 3y = 13


*4x -4y =-4

Answer 1

Explicación paso a paso:

2x + 3y = 13

4x + 3y = 26

4x = 26 - 3y

reemplazamos

4x - 4y = -4

26 -3y - 4y = -4

26 +4 = 7y

30 = 7y

y = 30/7

4x -4y = -4

x -y = -1

x -30/7 = -1

7x - 30 = -7

7x = 23

x = 23/7