Question: Determine by inspection if each system of equations has a single solution, no solution, or infinite solutions. If the system has a solution, solve the system. 1. {x + 5y = 9, 5y = 6 − x}
2. {x + y = 2, x + 3y = 6}
3. {2x + y = 5, y = 5 − 2 x}
4. {2x + 2y = 2, 2(x + y) = 10}
5. {−2y + 6 = −2x, 2y = 6 + 2x}