9 + x = 17


I know that x=8 but how did you get it

Thanks

9 + x = 17

Subtract 9 from both sides of the equation.

9 - 9 + x = 17 - 9

x = 8

Remember -- you need to get the known quantities on one side and the unknown on the other side.

thanks so much!

You're very welcome.

To solve the equation 9 + x = 17 for x, you can follow these steps:

Step 1: Start with the equation 9 + x = 17.

Step 2: In order to isolate the variable x, subtract 9 from both sides of the equation. This balances the equation:

(9 + x) - 9 = 17 - 9
x = 17 - 9

Step 3: Evaluate each side of the equation:

x = 8

Therefore, the value of x that makes the equation 9 + x = 17 true is x = 8.