Idont think im doing this correctly i seem to be getting a decimal, can someone plzz

Let
F = number of flashlights at $12 each
B = number of sleeping bags at $45 each.
F = 5B "The number of flashlight (F) ordered was five times the number of sleeping bags (5B)."
($12)F + ($45)B = $1785 "...the total cost was $1785,..." Substitute F = 5B.
12(5B)+45B = 1785 Simplify and solve for B.
60B+45B = 1785

105B = 1785 Divide both sides by 105.
B = 17 and...
F = 5B
F = 5(17)
F = 85
17 sleeping bags and 85 flashlights were ordered.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.