(12x+13)2 hope this helps
To answer this question and you will use exponents.
When you fold your paper three times, it is represented as two cubed or 2^3.
When you for your other sheet of paper two times, it is represented as two squared or 2^2.
Put Both of these together and you have 8+4 which equals 12.
It will take 12 layers of paper.
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Solution here,
In the figure, the upper small triangle is similar to a lagre triangle.
Now, from the property of similar triangle,

therefore, x= 7