528:( 5x-7)=16


594:( 8х-55)=18
735:(6х+17)=21

528:( 5x-7)=165x-7=528:165x-7=335х=33+75х=40х=40/5=8594:( 8х-55)=188х-55=594/188х-55=338х=33+558х=88х=88/8=11735:(6х+17)=216х+17=735/216х+17=356х=35-176х=18х=18/6=3