503. Solve the system of equations: 3x - 5y = 16, 2x + y = 2.

Solution:

1. From the second equation, express y: y = 2 - 2x.
2. Substitute this expression for y into the first equation: 3x - 5(2 - 2x) = 16 => 3x - 10 + 10x = 16 => 13x = 26 => x = 2.
3. Substitute the value of x back into the equation for y: y = 2 - 2(2) = 2 - 4 = -2.

Answer: x = 2, y = -2