In these lessons, we will learn how to solve a formula for a variable. It is also called solving literal equations.

Solving for a variable in a formula involves similar steps to solving for a variable in an equation. Let us review the steps as follows when we need to solve for a variable in a formula.

* Example: *

The formula for the area of a circle is *A* = p*r*^{2} . Solve for *r* in the formula .

* Example: *

The formula for the area of a circle is *A* = p*r*^{2} . Solve for *r* in the formula .

Examples:

1. Solve for r

d = rt

2. Solve for h

A = 1/2 bh

3. Solve for b

A = 1/2(b

4. Solve for w

P = 2L + 2W

5. Write y in terms of x

y - 3 = 1/3(x - 4)

6. Solve for a

1/a + 1/b = 1/2

Examples:

1. c = ipv, solve for v

2. p = a + 3b + 2c, solve for a

t = 3j + 3v, solve for k

Examples:

1. Solve for Solve for b

A = 1/2h(b

2. Solve for z

3z + x - y = 2x + 4

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