If after elimination you get 0 = 5 or determinant = 0, the lines are parallel. No solution.
Example: x + y = 2, x + y = 5 ⇒ 0 = 3. No solution.
If after elimination you get 0 = 0, the equations are the same line. Infinite solutions.
Example: x + y = 2, 2x + 2y = 4 ⇒ 0 = 0. Infinite solutions.
Substitute x and y back into both original equations to confirm.
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Solve using any method. State if there is a unique solution, no solution, or infinite solutions:y = 2x - 13x …
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