Answer:
y = -0.4x + 6
Step-by-step explanation:
Step 1: Solve for y
0.6x + 1.5y - 0.6x = 9 - 0.6x
1.5y / 1.5 = (9 - 0.6x) / 1.5
y = 6 - 0.4x
Answer: y = -0.4x + 6