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Anonymous
it could be anything. What is a? if it is 3 then you do 4x3=12+3x3=9+3=24
* * * * *
It is 8a.
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4a + 3a = (4 + 3)a = 7a
-7a + 3a = -4a
14a - 4a + 5a - 3a = 12a
3a * * * * * Actually, it is 4a.
3a - 2b