Answer:
Solution is (-3, 0). Lincoln.
Step-by-step explanation:
a. Lincoln's method: His an error was on the third line.
When distributing the 5 over the parentheses he did not multiply the -y by the 5.
He wrote -y while it should be -5y.
Claire's method: Mistake on line 3. She incorrectly distributed the negative over ( -3 - x) . Correct is 3 + x not 3 - x.
b. The correct solution is (-3, 0) which Lincoln got, just by luck, because if we substitute these values into the 2 equations they fit:
5(-3) - 0 = -15.
-3 + 0 = -3.