3A or 4A schools are about the size of the students. 4A schools have more students than a 3AM school
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If you mean: 4a +29 -3a -a +3a then it simplifies to 29 +3a
its all about the size of the school, as in, how many students the school has
Twenty-two thousandths
a + 3a - 2 + 3a. Add the a + 3a + 3a = 7a. You can't combine the -2 & 7a so the solution is: 7a - 2.
3a-2a = 1