If 5x – 5x - 3 = (124)(5y), what is y in terms of x?
A. x
B. x - 6
C. x - 3
D. 2x + 3
E. 2x + 6
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y in terms of x
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punit.kaur.mba
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Very clever thinking!!!!!Sorry how did you get this ,can u break it a bit further please?
=> 5^x[1 - 1/125] = 124*5^y
=> [5^x * 124]/125 = 124*5^y
5^x[1 - 1/125] became [5^x * 124]/125
Thanks
=> 5^x[1 - 1/125] = 124*5^y
=> [5^x * 124]/125 = 124*5^y
5^x[1 - 1/125] became [5^x * 124]/125
Thanks
aatech wrote:Just to clarify for others Q should be
5^x - 5^[x-3] = 124 * 5^y
=> 5^x - [5^x/5^3] = 124*5^y
=> 5^x[1 - 1/125] = 124*5^y
=> [5^x * 124]/125 = 124*5^y
=> 5^[x-3]*124 = 124*5^y
so, y = x-3
ANS C
Sorry worked it out, saw it wrong.
neilcao wrote:Sorry how did you get this ,can u break it a bit further please?
=> 5^x[1 - 1/125] = 124*5^y
=> [5^x * 124]/125 = 124*5^y
5^x[1 - 1/125] became [5^x * 124]/125
Thanks
aatech wrote:Just to clarify for others Q should be
5^x - 5^[x-3] = 124 * 5^y
=> 5^x - [5^x/5^3] = 124*5^y
=> 5^x[1 - 1/125] = 124*5^y
=> [5^x * 124]/125 = 124*5^y
=> 5^[x-3]*124 = 124*5^y
so, y = x-3
ANS C
