Coding and Decoding Questions

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

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

In a certain code language, "DESIRE" is written as "EGVMWK". How is "RECESS" written in that code language?

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 37*14 = 17,
69*33 = 34,
91*125 = 72
then what should 28*56 = ?

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

If A = 1, AND = 19, then ANT = ?

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