Question

I think of a number, double it and subtract two. I get nine.

using the statement above, from an equation. Use the letter "X" for the unknown number.
solve the equation as well.

Answer 1

5.5

Explanation:

your number is X

doubling it=2X

2X-2=9

using like terms...

2X=9+2

2X=11

dividing through by 2

2X/2=11/2

X=5.5