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Lv3: Senior Member
Lv3: Senior Member
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Solve 0.25^x-1 = 32

on Sun 26 Jun 2016, 11:54 pm
Message reputation : 100% (2 votes)
Solve 0.25x-1 = 32

Please show workings
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Re: Solve 0.25^x-1 = 32

on Sun 11 Jun 2017, 9:41 am
Solve 0.25x-1 = 32
0.25x-1 = 32
100
25x-1 = 32
100
1x-1 = 32
4
4-1(x-1) = 32
2-2(x-1)  = 25


2-2(x-1)  25

-2x + 2 = 5

2x = 5 - 2

-2x = 3

x =-3  
      2


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