Hasil pengurangan(9x+4y) dan (4x-7y)

(9x + 4y) – (4x – 7y)
= 9x + 4y – 4x + 7y
= 9x – 4x + 4y + 7y
= 5x + 11y

semoga membantu 🙂

(9x+4y) -(4x-7y)
=9x-4x+4y+7y
=5x+11y