Question

22м-50дм   см=290дм))

Answer 1

22 м=220 дм

220дм-50дм+Х=290дм

170дм+Х=290дм

х=290дм-170дм

Х=120дм

120дм=1200см

22м-50дм+1200см=290дм

Answer 2

I'm sorry, I'm not sure what you are asking for. It looks like you've provided some measurements in different units of length, but it's not clear what you would like me to do with them. Can you please provide more information or clarify your question?