SOLUTION: {{{ log (21, (x+84) ) = 3-log (21,x) }}}
Algebra.Com
Question 881262:
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Solve for x:
21^3=x^2+84x
x^2+84x-9261=0
(x+147)(x-63)=0
x=-147 (reject, (x+84)>0)
or
x=63
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