3a squared plus nine = 19a. 3a to the second power = 9a plus 9 = 19a.
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a + 3a - 2 + 3a. Add the a + 3a + 3a = 7a. You can't combine the -2 & 7a so the solution is: 7a - 2.
3a+5b+7a=
-7a + 3a = -4a
it could be anything. What is a? if it is 3 then you do 4x3=12+3x3=9+3=24 * * * * * It is 8a.
2a + 5a + 3a = 10a