9 + x = 17

I know that x=8 but I don't know how you figure it out

Please see my answer below.

because it is an equation, what you do to one side you must do to the other. In this case you are looking for what 'x' is, that is why it is labeled "x" because it is unknown. To find 'x' you must subtract 9 from the left side and then you must subtract 9 from 17 on the right side. You do this because in an equation, what you do to one side, you do to the other.

the final answer is: x= 8 because 17-9 equals 8.

To solve the equation 9 + x = 17, you need to isolate the variable x by performing inverse operations to both sides of the equation.

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

Step 2: To isolate x, subtract 9 from both sides of the equation: (9 + x) - 9 = 17 - 9.

On the left side, 9 - 9 equals 0, so the equation simplifies to: x = 17 - 9.

Step 3: Subtract 9 from 17 to get the value of x: x = 8.

Therefore, the value of x that satisfies the equation is x = 8.