14.
14*8-81=31.
or (31+81)/8 = 14
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six less than fourteen times a number
13 less than 4 times a number 13 less than is "-13" 4 times a number is "4x" 4x-13■
15 less than 7 times a number is:15-7n
numbe is 5
Five (5) more than (+) three times a number (3x) is (=) five times the number (5x) less (-) three (3) 5 + 3x = 5x - 3 x = 4