Solve this system of linear equations. separate the x - and y - with a comma 2x=-78-20y

-x=-51-20y

-x=51-20y

times - 2 both sides

2x=102+40y

since 2x=-78-20y

-78-20y=2x=102+40y

-78-20y=102+40y

add 20y both sides

-78=102+60y

minus 102 both sides

-180=60y

divide both sides by 60

-3=y

sub back

-x=-51-20y

-x=-51-20 (-3)

-x=-51+60

-x=9

x=-9

(x, y)

(-9,-3)