5/9(3.6а- 3 3/5b)-3.5(4/7a-0.2b)

Question

5/9(3.6а- 3 3/5b)-3.5(4/7a-0.2b)

Answer 1

Нужно упростить? если да, то:
= 5/9 (18а/5 - 18b) - 7/2 (4а/7 - b/5) = 90а/45 - 90b/45 - 28а/14 + 7b/10 = 2а - 2b - 2а + 7b/10 = 7b/10 - 2b = - 13b/10 = -1 3b/10