1/3a-2/5b+3/4a-4/15b=

Question

1/3a-2/5b+3/4a-4/15b=

Answer 1

1/3a+3/4a(доп. множ. 4 и 3) =4+9/12a
-2/5b-4/15b(доп. множ. к первой дроби 3)=-6-4/15=2/15b
13/12a+2/15b