Odd formula help request.

[lythande]

Hello board,

A + B = $18.68
Note that B = 12% of A

What is the formula to figure this out?

 

[tkhunny]

There is no forumla. There is understanding of the notation and the concept of substitution.

B = 12% of A

OR

B = 0.12*A -- This demonstrates understanding fo the notation

A + B = $18.68

OR

A + (0.12*A) = $18.68 - This demonstrates the concept of substitution.

 

[lythande]

So you're saying that there's no formula where I can slap, say, $18.68 into for it to figure out what A is?
If that's the case then doh!, but thanks for replying.

 

[tkhunny]

If you create the formula, then there will be one, but it will nto be very useful for any other problem.

Let's see what you get.