Wendy had 4 times as much money as Joel. She spent 1/4 of her money
and Joel spent 4/5 of his money. The amount of money Wendy had lett
was $9.80 more than the amount of money Joel had left.
(a) How much did Joel spend?
(b) How much did Wendy have left?
If Joel had $x, then Wendy had $4x, right?
3/4 (4x) = 1/5 x + 9.80
so Joel had x = $3.50
Now you can answer the questions