Expanding the given expression:
3(a) - 3(5b) + 3(6.1) - 5(-a) - 5(-3b) - 5(6.1)= 3a - 15b + 18.3 + 5a + 15b - 30.5= 8a - 12.2
Expanding the given expression:
3(a) - 3(5b) + 3(6.1) - 5(-a) - 5(-3b) - 5(6.1)
= 3a - 15b + 18.3 + 5a + 15b - 30.5
= 8a - 12.2