Coding and Decoding Questions

If SYSTEM is written as RXRSDL.
How can CORRECT be written in that code?

If "-" means "plus", "x" means "divide", "÷" means "multiply" and "+" means "minus", then 26 + 400 x 20 – 21 ÷ 12 = ?

In a certain code language, "SINGING" is written as "TJOHJOH". How is "DANCING" written in that code language?

If FRISKED is coded as HTKUMGF, then how will SUN be coded as?

In a certain code language, “TRAP” is written as “53” and “MADE” is written as “21”. How is “LATE” written in that code language?

If "+" means "minus", "x" means "divided by", "÷" means "plus" and "-" means "multiplied by", then
300 x 10 – 5 + 36 ÷ 57 = ?

The following equation is incorrect. Which two signs should be interchanged to correct the equation? 12 - 6 x 5 + 20 ÷ 4 = 31

If CROWNED is coded as APMULCB, then how will TAP be coded as?