-171 = 19x so x = -9
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(x-7)(x-3)
The mathematical statement 31 plus 21 equals 52 as a total.
The statement 10 plus 21 equals 31 in total. It can also be written as 10 + 21 = 31.
The answer is 21 because if 21 is divided by 3 it equals 7 plus 4 equals 11.
21