9a + 1
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3b -1
(2a+1)(a+1)
5a + 3 + (2a - 2) + a= 5a + 3 + 2a - 2 + a= 8a + 1
-2a + 5 = 1 -2a = -5 + 1 -2a = -4 a = -4/-2 a = 2
12a- 6a + a = 7a Since they all have the same variable, you can simply add and subtract 12-6 = 6 6+1 = 7