If [ y = 3 + x ],
then [ x = y - 3 ].
That's all you can tell with the given information.
If you want to know what 'x' and 'y' are, you need one more equation.
We don't know and we can't calculate it, until the value of 'x' is given.
x = 0
x equals 8
9
12!
(0, -3)
(3, 5)
12x = x + 3 11x = 3 x = 3/11
x + 3 = 2x 3 = x x cannot be 2
Symmetric Property of Addition
it equals 3.
6