Choice D is the correct answer. Multiply first by 2 and second by 5.

Step 1: Multiply: $8x + 10y = 66$$15x - 10y = 40$

Step 2: Add: $23x = 106$$x = \frac{106}{23}$

Non-integer. - First: $4(4) + 5(\frac{17}{5}) = 16 + 17 = 33$✓

• Second: $3(4) - 2(\frac{17}{5}) = 12 - \frac{34}{5} = \frac{60-34}{5} = \frac{26}{5} \ eq 8$

💡 Strategic Tip: LCM of 5 and 2 is 10.

**Other choices fail.