Question

Consider the following pair of equations: y = x + 4 y = –2x – 2 Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

Answer 1

Y = x+4 (1)
Y = -2x-2 (2)

(1)=(2)

X+4=-2x-2
3x=-6
X=-2

Sub x=-2 into (1),

Y= (-2)+4
Y= 2

Thus, the solution is (-2,2)