log8 x + log2 x =14 (log x по основанию 8

Log(2)x/log(2)8+log(2)x/log(2)2=14
log(2)x/3+log(2)x/0,5=14
log(2)x/3+2log(2)x=14
log(2)x+6log(2)x=42
7log(2)x=42
log(2)x=42:7=6
x=2^6
x=64
Ответ х=64

log(3)x=a
a-2a-30
a1+a2=2 U a1*a2=-3a=3 U a2=-1
         +              _            +
-----------------------------------------------------
               -1                3
-1a3
-1log(3)x3
1/3x27
x[1/3;27]