"a" plus "3a" is equal to 4a. (3a+a=4a). You already have 3 "a's" and then you add another "a."
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What is the solution of -2a plus 3a plus 5b
It can be simplified to: 3a^2 +10a+7 or factored as (3a+7)(a+1)
The given expression can be simplified to: 3b-a
3a + 2a = 5a
a + 3a + 5a = 180 9a =180 a = 20