I need help with these problems and my book doesnt explain it very well.

Solve the formula I = Prt for P

Solve the formula A = P(1+rt) for r

Solve x + yr = z for z

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- Mar 7th 2007, 11:00 PMfyisvdTransforming Formulas
I need help with these problems and my book doesnt explain it very well.

Solve the formula I = Prt for P

Solve the formula A = P(1+rt) for r

Solve x + yr = z for z - Mar 7th 2007, 11:12 PMCaptainBlack
dicide both sides by P:

A/P=1+rt.

Subtract 1 form both sides (as two things that are equal are still equal when

the same thing is added or subracted from both)

A/P - 1 =rt

Divide both sides bt t:

(A/P - 1)/t =r,

or:

r = (A/P - 1)/t,

Quote:

Solve x + yr = z for z

(if something is equal to a thing, then the thing is equal to that something)

RonL