# Solving Algebraic Equations for a Given Variable

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1. Solve the following formula for R: I = E / R + r

2. Sqrt of 5x - 9 = 4

3. One bag of grass seed will cover an area of 300 square feet. If the width of the area is 5 ft less than the length, determine the dimensions.

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#### Solution Preview

1. Solve the following formula for R:

I = E / R + r

I - r = E / R

(I-r)R = E

R = E / (I-r)

(Note, requiring R ≠ r)

2. Sqrt of 5x - 9 = 4

SQRT(5x) - 9 = 4

Then SQRT(5x) = 4+9

SQRT(5x) = ...

#### Solution Summary

Algebraic equations are solved for a given variable.

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