Question

The sum of a number and seven is doubled​, the result is two less than

the number. Find the number.

Answer 1

-16

Explanation:

Let's call the number x. Double the sum of x and seven is 2(x + 7) and two less than x is x - 2. Since these are equal we can write:

2(x + 7) = x - 2

2x + 14 = x - 2

x = -16