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3a + 21 = 7 - 4a what's the answer
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3a + 21 = 7 - 4a what's the answer

User Mgutt
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after simplifying a= -2
User FileVoyager
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3a + 21 = 7 - 4a

3a + 4a = 7 - 21

7 a = -14

a = - 14 / 7

a = - 2

hope this helps!
User FancyXun
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