hi
my name is amin and I answer your question from iran
your answer is here with the truest math prove
so do not have any nervous!
and the answer:
he wants to buy 40 bulb in box of 4 or 8
so we must use the theory that called Ferma Theory. You can check it out in internet.
we have this formula: 40 = 4x + 8y
x is the number of 4 capacities bulbs and y is the number of 8 capacities bulbs.
you can write it with this shape: 4(10) = 4(x + 2y)
so,
10 = x + 2y
now we use ferma Theory.
so one of the answer is x=0 and y=5.
and the other answers are:
x=2,y=4
x=4,y=3
x=6,y=2
x=8,y=1
x=10,y=0
so we have only 6 ways to divide the bulb.
if you have any problem mail me with
[email protected]
be succeed
:cool: