Liam has a bag of b beads. He gives 20 beads to his sister. He then uses all of the remaining beads to make 4 necklaces with the same number of beads on each necklace.Liam has a bag of b beads. He gives 20 beads to his sister. He then uses all of the remaining beads to make 4 necklaces with the same number of beads on each necklace. do a step by step explanation plz help me