Question

The product of a number and 7 less than the number is 30. Find the number.

Answer 1

-3 or 10

Explanation:

`x(x - 7) = 30`

`{x}^(2) - 7x = 30`

`{x}^(2) - 7x - 30 = 0`

`(x - 10)(x + 3) = 0`

x = -3 or 10