The students responsible for costumes knew they needed to make blouses, skirts and pants for the play. For the material, the costume makers needed twice as much material for each pair of pants as they needed for a blouse. For each skirt, they required units more than what was needed for a blouse. If the play required 8 blouses, represented by b, 2 pairs of pants and 3 skirts, how many units of material did the costume makers need? ​

Idon’t understand this but 90

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.