Question

x+ 2y = 10
x + y = 6
whats my answer?
(0,-4)
(2,2)
(2,4)
(-4,-2)

Answer 1

can you subtract the two equations?

try top equation minus bottom equation.
what do you get ?

Answer 2

(2,4)?????

Answer 3

try top equation minus bottom equation.
what do you get ?

you get a new equation, not a number.

Answer 4

OHH....

Answer 5

like this
start with
x+ 2y = 10
x + y = 6

on the left side do x+2y -x - y (we subtract all the terms of the bottom equation)
on the right side of the = sign we do 10 -6 (which is 4)
now you have
x+2y -x - y = 4

can you simplify the left side ?