0
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a= -0.8
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-4 + 2A = 12 - 15A + A-4 + 2A = 12 - 16A2A = 12 - 16A + 42A = 16 - 16AA = 8 - 8A
12 + 5 equals...
-0.5
-12=m+4 -16=m
7x = 3x - 12 4x=-12 x=-3