I think of a number I double it and subract two I get nine​

5.5

Step-by-step explanation:

Let be equal to the number.

1) Convert the clues into an equation

If you double it () and subtract two (), you get 9 ().

2) Solve the equation

Add 2 to both sides

Divide both sides by 2

Therefore, the number is 5.5.

I hope this helps!

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.