SOLUTION: For problems 13 and 14, assign each letter and a blank space to a number as shown by the alphabet table below. Use the code [1,-2_-3,7] encode the phrase "ONE QUESTION TO GO"

Question 866810: For problems 13 and 14, assign each letter and a blank space to a number as shown by the alphabet table below.
Use the code [1,-2_-3,7] encode the phrase "ONE QUESTION TO GO"

The matrix C=[1,-2_-3,7] was used to encode a phrase to [7,-28,-25,-35,-2_-21,107,90,123,17] find C-1 and use it to decode the matrix.
If someone could explain the steps
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
097,098,099,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,32
a ,b ,c ,d ,e ,f ,g ,h ,i ,j ,k ,l ,m ,n ,o ,p ,q ,r ,s ,t ,u ,v ,w ,x ,y , z, space
79 78 69 32 81 85 69 83 84 73 79 78 32 84 79 32 71 79
O N E Q U E S T I O N T O G O

http://www.math.washington.edu/~king/coursedir/m308a01/Projects/Cryptography.htm
http://aix1.uottawa.ca/~jkhoury/cryptography.htm
https://www.math.ucdavis.edu/~daddel/linear_algebra_appl/Applications/cryptography/cryptograph_9_17/node8.html
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