Decrypt the received encoded message 2 -3 20 4 with the encryption matrix -1-121 and the decryption matrix as its inverse , where the system of codes are described by the numbers 1-26 to the letters A-Z respectively , and the number 0 to a blank space.

Decrypt the received encoded message $|2 - 3| |20 4|$ with the encryption matrix $[\begin{matrix} - 1 & - 1 \\ 2 & 1 \end{matrix}]$ and the decryption matrix as its inverse , where the system of codes are described by the numbers 1-26 to the letters A-Z respectively , and the number 0 to a blank space.

Matching exercise

Match the items on the right to the items on the left.

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STEP 6