Question 1079253
{{{ log( 8, (b + 9) ) = log( 8, (-b + 1) ) }}}
{{{ b + 9 = -b + 1 }}}
{{{ 2b = -8 }}}
{{{ b = -4 }}}
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check answer:
{{{ log( 8, (-4 + 9) ) = log( 8, (-(-4) + 1) ) }}}
{{{ log( 8, 5 ) = log( 8, 5 ) }}}
OK