Step-by-step explanation:
8.2 + 3.9y - 0.5(8y - 9)
= 8.2 + 3.9y - 4y + 4.5
= 3.9y - 4y + 8.2 + 4.5
= -0.1y + 12.7
Answer:
9.4x+6.4y