Impossible to answer without the missing operator between the 73 and the 9.
Please resubmit with the operator as a word, eg "What is 73 plus 9"?
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9 is not a prime. 73 is a prime.
(1) 9x-2y=73 (2) 5x-9y=9 from (1) 9x-2y+2y=73+2y => 9x= 73+2y => x = (73+2y)/9 put into (2) 5x-9y = 9 => 5(73+2y)/9 - 9y=9 => 10y/9 + 365/9 -9y = 9 => 10y/9 - 9y = 9 -365/9 = -284/9 => -71y/9 = -284/9 => 71y= 284 => y = 284/71 = 4 and x = (73+2*4) / 9 = 9
4x + 9 = 73 4x = 64 x = 16
67 + 73 - 3 / 3 - 9 * 7 = 67 + 73 - 1 - 63 = 76.
73 is 9 more than the product of 4 and 16