x^2+y=9, x-y+3=0. Need to solve using substitution method.

Answer 1

from the second ...
y = x+3
sub into first
x^2 +x+3 = 9
x^2 + x - 6 = 0
(x+3)(x-2) = 0
x = -3 or x = 2

sub both values into y = x+3 to find their corresponding y's

Answer 2

Thanks