If - 2A + 7 and - 3 / 5-3a are opposite, then a = ()
Opposite numbers
So - 2A + 7 = 3 / (5-3a)
Multiply by three on both sides
-6a+21=5-3a
3a=16
a=16/3
If 2A + 7 and 1-3a are opposite to each other, then a=______ .
According to the meaning of the question: 2A + 7 + 1-3a = 0, the combination of moving items: - a = - 8, the solution: a = 8
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