Question

Solve the following system of equations by the substitution method.
x - y = 0
x - y - 2 = 0
What is the solution set?
{(1, -1)}
{(-1, 1)}
Ø

Answer 1

there's no solution.

Answer 2

yes there is no solution!

Answer 3

if u add 2 to both sides in the second equation, ur system would be
x - y = 0
x - y = 2
which has no solution

Answer 4

because x=y,
and you will get -2=0 if you sub into the second equation which is not correct.