I find myself in the odd situation of actually having to use algebra in real life many many years after leaving school!
If C = A + A * B, how do I find A from knowing B and C? If it makes any difference, A,B & C are all greater than zero.
I find myself in the odd situation of actually having to use algebra in real life many many years after leaving school!
If C = A + A * B, how do I find A from knowing B and C? If it makes any difference, A,B & C are all greater than zero.
I'll take $\displaystyle A*B$ as A times B.
$\displaystyle A+AB = C$, the left hand side of this equation has common factor A, we can therefore write it as:
$\displaystyle A(1+B) = C$, then dividing both sides by $\displaystyle 1+B$,
$\displaystyle A = \frac{C}{1+B}$
Hope this helps
Why can't you just subtract the product of (A*B) from C? Would this be wrong?
I don't think my method would answer his question because it doesn't simply the equation to A in terms of B and C (it is A in terms of A,B, and C) amd I right?
So...
C = A + (AB) -> (-AB)
C - AB = A