Let us assume the unknown number to be = x
Then, based on the information's already given in the question the equation can be written as
7x - 12 = 16
7x = 16 + 12
7x = 28
x = 28/7
= 4
So from the above deduction we can conclude that the unknown number in the question is 4. I hope the procedure is simple enough for you to understand.You can always use this method in future for solving similar problems.
