Question

有绵羊,山羊共3561只,如果绵羊减60只,山羊加100只,则绵羊数仍比山羊数的2倍还多1只,原有绵羊几只?

Answer 1

绵羊-60=(山羊+100)*2=1

绵羊-60=山羊*2+200+1

绵羊=*2=山羊140+1

绵羊：(3561-1)/2+60

=3560/2+60

=1780+60

=1840(只)

答：绵羊有1840只.