First, let's distribute the constants:
5/12 (4.8a - 1.2b) = 20a/3 - 5b/3-3.6 (4/9a - 1/4b) = -16/5a + 9/10b
Now simplify:
20a/3 - 5b/3 - 16/5a + 9/10b= (20a - 16/5a) / 3 + (-5b + 9/10b) / 3= (100a/5 - 16a/5) / 3 + (-50b/10 + 9b/10) / 3= (84a/5) / 3 + (-41b/10) / 3= 84a/15 - 41b/30= 28a/5 - 41b/30
So, 5/12(4.8a-1.2b)-3.6(4/9a-1/4b) simplifies to 28a/5 - 41b/30.
First, let's distribute the constants:
5/12 (4.8a - 1.2b) = 20a/3 - 5b/3
-3.6 (4/9a - 1/4b) = -16/5a + 9/10b
Now simplify:
20a/3 - 5b/3 - 16/5a + 9/10b
= (20a - 16/5a) / 3 + (-5b + 9/10b) / 3
= (100a/5 - 16a/5) / 3 + (-50b/10 + 9b/10) / 3
= (84a/5) / 3 + (-41b/10) / 3
= 84a/15 - 41b/30
= 28a/5 - 41b/30
So, 5/12(4.8a-1.2b)-3.6(4/9a-1/4b) simplifies to 28a/5 - 41b/30.