The number 2.
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It is 17 because (17+19)/3 = 12
3
Sum the number and divide the answer by the number of values that were added together.
Let x be a number. 16=(3+x)*4 16=12+4x 16-12=12+4x-12 4=4x 4/4=4x/4 1=x Therefore a number is 1.
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