The ratio of the number of alex's beads to the number of betty's beads was 3:4.after alex bought another 72 beads,the ratio became became 3:1.

Question

A. How many beads did betty have?
B.if alex gave away 80 beads,what would by the new ratio of the number of betty's beads to the number of alex's beads?

Answer 1

a/b = 3/4
(a+72)/b = 3/1

4a = 3b
a+72 = 3b

4a = a+72
a = 24
so, b=32

check: 24+72 = 96 = 3*32

Answer 2

^ what he said looks about right mate!