If 32y-1 = 128y ; find y
Solution
32y-1 = 128y Find prime factors of 32 and 128.
(25)y-1= (27)y multiply the powers.
25y-5 = 27y when bases are alike they cancel out.
5y – 5 = 7y simple algebra
5y – 7y = 5
-2y = 5
- 2y = 5
- 2 -2
y
= 5/-2
Hence y =5/-2
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