Question

y = 3x + 3
y = x − 1

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

Well if Y= x-1 then plug into Y in the problem y=3x+3 and solve it using common factors and terms.

Answer 2

given

y = 3x+3
and
y = x-1

but we know y = y

so in this way we can write

3x+3=x-1

solve this for x