The sum of the two digits of a number is 16. the number formed by reversing the digits is 18 more than the original number. determine the original number. let t = the tens digit, u = the units digit, and u + t = 16. which of the following equations would complete the system?

9t - 9u = 18
9u - 9t = 18
tu = ut + 18

Step-by-step explanation:

The equation that completes the system is:

First, we have to remember that tens value 10 units per digit, and units value one uni per digit. So, the number of the problem would be expressed like:

Now, the problem states that if the number is reversed its formed another number which is 18 units more than the original, that would be expressed like:

Solving this relation, we have:

Therefore, the expression that complete the system is the second equation.

step-by-step explanation:

step-by-step explanation:

4  

25

5258y

54.

t5

5r

54

5856

542

5458

86

.8558.65

565

565

55898

786

8/95

5896

8656265

556478