How do you solve the following system?: 1/9x-3/13y=1 , 3/2x - 8y = 2 19x313y=1,32x8y=2

1 Answer
Jun 8, 2017

color(blue)(y=-0.25,x=0y=0.25,x=0

Explanation:

:.1/9x-3/13y=1----(1)

:.3/2x-8y=2----(2)

multiply (2) xx 2

:.3x-16y=4

:.-16y=-3x+4

:.16y=3x-4

:.color(blue)(y=(3x-4)/16

substitute color(blue)(y=(3x-4)/16--- in (2)

:.3/2x-8((3x-4)/16)=2

:.3/2x-(24x+32)/16=2

multiply both sides by 16

:.24x-24x+32=32

:.24x-24x=32-32

:.0=0

:.color(blue)(x=0

substitute color(blue)(x=0 in (2)

:.3/2(color(blue)0)-8y=2

:.-8y=2

multiply both sides by -1

:.8y=-2

:.y=-2/8

:.color(blue)(y=-0.25 or color(blue)( -1/4

check:

substitute color(blue)(y=-0.25 in (2)

:.3/2x-8(color(blue)(-0.25))=2

:.3/2x+2=2

:.3/2x=2-2

:.3/2x=0

:.color(blue)(x=0