Choice C is the correct answer. I'll use elimination by multiplying second by 3.

Step 1: Multiply second by 3: $6x + 3y = 33$

Step 2: Add to first: $(5x - 3y) + (6x + 3y) = 16 + 33$$11x = 49$$x = \frac{49}{11}$

Non-integer. - First: $5(4) - 3(3) = 20 - 9 = 11 \ eq 16$

• Second: $2(4) + 3 = 11$ ✓

💡 Strategic Tip: Multiplying by 3 creates $+3y$ to cancel $-3y$.

**Other choices fail.