SAT Math Tutorial
solving literal equations
Intro
The key to solving this problem is to isolate the variable on one side and then solve.
Sample Problem
Solution
step 1: multiply both sides by N+F
(N+F) R = F/N +F * N+F
step 2: Subtract RF from both sides
RN + RF = F
– RF -RF
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step 3: Key step** factor out the variable
RN = F – RF
RN = (1 – R)F
step 4: isolate and solve for the variable by dividing by (1-R) on both sides
FINAL ANSWER
RN /(1-R) = F
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