$32
1) Let's set an expression to find out
Janet: $24 per hour
Adam: ?
2) Since Janet wants to find out how much Adam earns then, we can write:
3/4 x = 24 Multiply both sides by 4, to get rid of that fraction
3x = 96
x = 96/3
x=32
3) Hence, Adam earns $32 and Janet $24