If 3x + 4y – 11 = 18 and 8x – 6y + 12 = 6, then what is the value of 5x – 3y – 9?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. -9
3x + 4y = 29, 8x - 6y = -6
solving for x and y
x = 3, y = 5
5x - 3y - 9 = 5 × 3 - 3 × 5 - 9 = -9