The product of a number and nine less than a number is 10 find the number

Answer 1

If you translate the words into a math expression, you will get x (x-9) =10

Then you have a quadratic equation: x^2 - 9x -10 = 0

Factor it, you will get (x-10) (x+1) =0

Then you have two solutions: x=10, and x=-1

If you like, you can check your solutions: 10x(10-9)=10, -1(-1-9) =10.

Done.

Answer 2

x(x-9) = 10

x^2 -9x -10 = 0

(x-10)(x+1) = 0

x=10 or -1

10(1) = 10

-1(-10) = 10

Answer 3

How about 10 and 1?