Question

¿cual es el valor de x?

• 2x-5y=4y-7

• -3x+2y= 14

Answer 1

2x-5y=4y-7 (3) -3x+2y=14 (2)

6x-15y=12y-21 -6x+4y=28

6x-27y=-21

6x-27y=-21

-6x+4y=28

_________

-23y=7

y=7/-23

y=0.3

2x-5(o.3)=4(0.3)-7

2x-1.5=1.2-7

2x-1.5=-5.8

2x=-5.8+1.5

2x/2=-4.3/2

x=-2.15