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Pre-Algebra 9 Online
OpenStudy (scott208):

Subtract a-4 from 4a+16 and simplify your answer. The variable a should appear only once in your answer. Please help will fan and medal

OpenStudy (adonine):

4a + 16 - (a - 4) = 4a + 16 - a + 4 = 3a + 20

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