Question

2x-4y=10 4x+8y=28 sutitucion

Answer 1

Explicación paso a paso:

2x-4y= 10

4x+ 8 y = 28

4x+ 8 y = 28

4x= 28-8y

x= (28-8y)/4

x= 7-2y

2(7-2y)-4y= 10

14-4y-4y=10

14-8y=10

14-10=8y

4=8y

4/8=y

0.5= y

x= 7-2y

x= 7-2(0.5)

x= 7-1

x= 6