Answer:
18.9c - 11.2d + 9.3f
Explanation:
First, write the equation as adding all the parentheses together like so:
(9.7c - 1.9d) + (9.2c + 1.1f) + (8.2f - 9.3d)
Remove the parentheses:
9.7c - 1.9d + 9.2c + 1.1f + 8.2f - 9.3d
Collect like terms (9.7c and + 9.2c):
18.9c - 1.9d + 1.1f + 8.2f - 9.3d
Collect like terms again (1.9d and - 9.3d):
18.9c - 11.2d + 1.1f + 8.2f
Collect like terms again (1.1f + 8.2f)
18.9c - 11.2d + 9.3f
Hope this helped!