Question 1174640
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Yes; we can tell you what you did wrong -- not all of the numbers in your equations are the numbers that were given.<br>
With the equations you show, the answer of x=20.4 is correct; but it is not a whole number.<br>
Assuming you checked your work a second time and still got the same answer, which you know can't be right, you should then go back and see if your original equations were correct.<br>
Apparently the work you did getting from your original equations to your answer was correct, so I will assume you can get the answer when you start with the right equations.<br>