When a number is doubled and then taken away from 10, the result is negative 18, what is the number

The number is 14.

Step-by-step explanation:

Assuming that x is the number that we are looking for, then it is first doubled "2x", if it's taken away from 10 we have "10 - 2x" and this is equal to - 18. Therefore we have the expression:

10 - 2x = - 18

-2x = - 18 - 10

-2x = - 28

x = - 28/-2

x = 14

The number is 14.