Question

HELP Please THANKS (:

Answer 1

subsitution
y=x-6
subsitute x-6 for y in the other equation

x+y=10
subsitute x-6 for y
x+x-6=10
combine like terms
2x-6=10
add 6 both sides
2x=16
divide by 2
x=8

sub back

y=x-6
y=8-6
y=2

x=8
y=2
(x,y)
(8,2)

D is answer

Answer 2

x+y=10
-x+y=-6
2y=4
y=2
x+4=10
x=8
Final answer: D