Question

Solve this using substitution:
-x-2y=5
x-4y=19

Answer 1

(3,-4)

Explanation:

x-2y=5

x-4y+4y=19+4y

x=19+4y

substitue x

-(19+4y)-2y=5

-19-4y-2y=5

-19-6y=5

-6y=5+19

-6y=24

divide by 6 in both sides

y=-4

find Y now

x=19+4(-4)

x=19-16

x=3

(3,-4)