Find the number if the square root of another number that is 6 greater than this number is equal to the number itself.

The number is 3 and the another number is 9

Step-by-step explanation:

Let

x-------> the number

y-----> another number

we know that

----> equation A

----> equation B

Substitute equation A in equation B

squared both sides

Using a graphing tool

solve the quadratic equation

see the attached figure

The solution is  x=3

Find the value of y

------->

answer: 21$

step-by-step explanation:

$42 / $14 = 3   (ratio 3: 1)

$7 x 3 = $21