If four times a number is increased by 15 the result is three less than six times the number find the number

9

Step-by-step explanation:

Let the number be n.

Then:  4n + 15 = 6n - 3

Subtract 4n from both sides, obtaining:  15 = 2n - 3

Now add 3 to both sides, obtaining 18 = 2n.  Then n = 9.

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square