Answer:
a = -4/5
Explanation:
12a - 4(5a -1) = 2(3a +6) - 4a
12a - 20a + 4 = 6a + 12 - 4a
12a - 20a - 6a + 4a = 12 - 4
-10a = 8
a = - 8/10
a = - 4/5
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