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³log = ³log 9
maka
= 9
2x + 1 = 9(x-7)
2x+1=9x-63
11x = 64
x = 64/11
³log (2x+1)/(x-7)=2
(2x+1)/(x-7)=3²
2x+1=9(x-7)
2x+1=9x-7
7x=8
x=8/7