Respuesta :

you are implying that 2x- 9=31

Add 9:

2x=40

Divided by :2

x=20

therefore I thing the number is 20

Answer:

[tex]\boxed{x=20}[/tex]

Step-by-step explanation:

Less than- you had to subtract by the minus sign.

First you had to translate words into an equation.

2x-9=31

Then you solve by equation and add by nine from both sides of equation form.

[tex]2x-9+9=31+9[/tex]

[tex]2x=40[/tex]

Next, you divide by two from both sides of equation form.

[tex]\frac{2x}{2}= \frac{40}{2}[/tex]

[tex]40/2=20[/tex]

[tex]40/20=2[/tex]

[tex]2*20=40[/tex]

[tex]20*2=40[/tex]

[tex]x=20[/tex]

Hope this helps!

And thank you for posting your question at here on brainly, and have a great day.

-Charlie