Answer:
No 4 is easy you get 2/3
My explanation is just make the denominator the same which is 13/6 - 9/7
13 x 7/6x7 - 9x6/7x6
The answer it its 91/42 - 63/42
=28/42
If you simply it it would be 2/3
(/ this means by) sorry for my bad explanations
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