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There are two whole things in front that are two.The last one is divided into four, and the shadow is two, which is one half.
You need to get x alone. So first you bring the 13 over and it becomes negative because it switches signs when switching sides
13x=104-13
13x=91
The you have to divide by 13 since you are multiplying on the other side
X=91/13
Your final answer should be
X=7
The answer is 30.
Sorry Last time I found the LCM of the answers.