SOLUTION: how would i change 1.00x + 0.28(40) = 0.40(x + 40) into a word problem

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Question 149464This question is from textbook
: how would i change 1.00x + 0.28(40) = 0.40(x + 40) into a word problem This question is from textbook

Answer by nabla(475) About Me  (Show Source):
You can put this solution on YOUR website!
We could say,
x+.28y=.4(x+y)
x+.28y=.4x+.4y
-.12y=-.6x
y=5x
f(x)=5x
Now, for the given, f(x)=40=y gives x=8.

So, this is pretty simplified.
We can say, for example:
Larry needs to purchase as many 2x4s as he can with his $40. Each 2x4 costs $5. How many 2x4s can he buy?
The solution is found by working backward.