Explanation:
So let us say $48 is the total. Let Sunday be y
So automatically Saturday y+12
y+12+y=$48
So now we collect the like terms
y+y+12=$48
Now we add
2y + 12 =$48
2y = $48-12
2y= 36
2y/2 = 36/2
And now just divide
y=$18
Saturday: y+12
18+12
30
Proof
30 + 18 = $48