Question

2. Solve the system of equations by Substitution. Show ALL your work. 9x2 + y2 = 9 y = 3x − 3

Answer 1

x = 1, y = 0

Explanation:

9x² + y² = 9 or 3x + y = 3 by squaring both sides

y = 3x - 3

3x + y = 3 substitute 3x - 3 to y

3x + 3x - 3 = 3

6x = 6

x = 1

3x + y = 3

3(1) + y = 3

3 + y = 3

y = 0