Question

An equation in the system is y = x + 1. What is the other equation in the system if the solution is only at (0, 1)?
a) x − y = 1
b) 2x + 2y = 4
c) x + y = 1
d) x + 2y = 2

Answer 1

Plug in that value, the equation which verifies it is the correct choice:

a) L.H.S = 0 - 1 = -1

b) L.H.S = 0 +2 = 2

c) 0 + 1 = 1 = R.H.S

d) 0 + 2 = 2 = R.H.S