Question

A) 5 (a-b+c) 5-2a (-6+c-d) 6) 30 (2m-34+5)​

Answer 1

А. 5•(а-b+c)•5-2a•(-6+c-d)
5a-5b+5c•5+12a-2ac+2ab
5a+12a=17a
17a-5b+25c-2ac+2ab

б. 30•(2m-34+5)
60m-1020+150
60m=-1020+150
60m=-870
m=-870:60
m=-14,5

я не уверена, что номер «а» верно построен в задание, перепроверьте, пожалуйста

Answer 2

It appears you have provided several mathematical expressions, but it's not entirely clear what you want to do with them. Are you looking to simplify these expressions or solve for specific variables? Please provide more context or specify your question so that I can assist you more effectively.