ако log 10 5 + log 10 ( 5 x + 1 )  log 10 ( x + 5 ) + 1 , тогава x е равно на:
log 10 5 + log 10 ( 5 x + 1 )  log 10 ( x + 5 ) + 1 log 10 5 + log 10 ( 5 x + 1 )  log 10 10 10 log 10 [ 5 ( 5 x + 1 ) ]  log 10 [ 10 ( x + 5 ) ] 5 ( 5 x + 1 )  10 ( x 5 )
divide(subtract(10, 1), subtract(5, const_2))