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# The average of 3a+4 and another number is 2a. what is the

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The average of 3a+4 and another number is 2a. what is the [#permalink]  08 Apr 2005, 10:25
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The average of 3a+4 and another number is 2a. what is the average of the other number and a?
a) 2a
b) a-4
c)a-2
d)a+2
e)a+4
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Re: DS -6 [#permalink]  08 Apr 2005, 11:54
If that number is x,
3a + 4 + x = 4a
=> x = a - 4.
Av of x and a = (a - 4 + a)/2 = a - 2
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Re: DS -6   [#permalink] 08 Apr 2005, 11:54
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