Question 253559
x+y=24 or x=24-y
4x+5y=100
Now replace x with (24-y) i the second equation & solve for y.
4(24-y)+5y=100
96-4y+5y=100
y=100-96
y=4 questions worth 5 points each.
24-4=20 questions worth 4 points each.
Proof:
4*20+5*4=100
80+20=100
100=100