Question

I'm thinking of a number. When I double my number and then subtract the result from five I get negative one. What is my number

Answer 1

x - the number
you double the number - 2x
you subtract the result from five - 5-2x
you get negative one - 5-2x=-1


`5-2x=-1 \\ -2x=-1-5 \\ -2x=-6 \\ x=(-6)/(-2) \\ x=3`

The number is 3.