None of the suggested answers makes any sense.

It looks like you may be trying to write an equation for the perimeter. Such an equation might be

9 + x + 2 = p

where p is used to represent the perimeter.

If the figure is truly a triangle, the value of x will be between 9-2=7 and 9+2=11. Thus, the perimeter can be no less than 18 and no more than 22. In any event, the value of x will show up only once in the equation for the perimeter.

If the perimeter is 19 (a value between 18 and 22), an equation that might be used to find x would be

x + 2 + 9 = 19

It looks like you may be trying to write an equation for the perimeter. Such an equation might be

9 + x + 2 = p

where p is used to represent the perimeter.

If the figure is truly a triangle, the value of x will be between 9-2=7 and 9+2=11. Thus, the perimeter can be no less than 18 and no more than 22. In any event, the value of x will show up only once in the equation for the perimeter.

If the perimeter is 19 (a value between 18 and 22), an equation that might be used to find x would be

x + 2 + 9 = 19