599 = dividend+divisor+quotient+remainder

= (quotient * divisor+remainder)+divisor+quotient+remainder

= (quotient+1) * divisor+remainder * 2+ quotient

Therefore, divisor =(599- quotient-remainder *2)/ (quotient+1)

=(599- 15- 12*2)/( 15+ 1)

= 35 Hope to adopt