An equation will remain equal if the same thing is done to both sides of the equation.
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If you fold a piece of paper, it will have 2 rectangles.
If you fold it again, it will have 4 rectangles.
If you fold it again, it will have 8 rectangles.
So, if you fold it n times, it will have 2^n rectangles.
If your paper has 128 rectangles, you made 7 folds.
If you fold it again, it will have 4 rectangles.
If you fold it again, it will have 8 rectangles.
So, if you fold it n times, it will have 2^n rectangles.
If your paper has 128 rectangles, you made 7 folds.