Layla makes three dollars in profit for every four dollars that Joe makes if their total profit on the first item sold is $105 how much profit does Layla make

I would start with writing an equation. You could make a table but that might take a long time.

x = Layla

x+1 = Joe

x+x+1=105

2x+1=105

sub 1 from each side

2x=104

divide both sides by 2

x=52

So, Layla would make $52 in profit