SOLUTION: If a number multiplied by 8 and then increased by 5 is 20 more than the square of the number. What is the number?

Question 825039: If a number multiplied by 8 and then increased by 5 is 20 more than the square of the number. What is the number?
Found 2 solutions by phoihe001, y6n3o9p4:
Answer by phoihe001(34) (Show Source): You can put this solution on YOUR website!
The number is 3 or 5
Answer by y6n3o9p4(20) (Show Source): You can put this solution on YOUR website!
Here's another way to write this: (x is the unknown number)
First subtract the right side from the equation, therefore moving it to the left side.
Combine like terms.
This is a quadratic equation, which can be solved using the quadratic formula:
Enter the values into the formula and simplify until you have your answer.

This problem has two possible solutions.
Solution 1:

Solution 2:

The number is 3 or 5.
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