Solving for a Variable in a Formula

pV = nRT
solve for R

• R= pV/nT

• R= p/n + V/T

• R= pV - nT

• R= (pV-n)/T

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CCSS.HSA.CED.A.4

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You might recognize the formula:

y = mx + b

as the equation of a straight line in slope-intercept form.

Solve this equation for b.

• b = y + mx

• b = mx - y

• b = y - m - x

• b = y - mx

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CCSS.8.EE.B.6

CCSS.8.F.A.3

You might recognize the formula: y = mx + b as the equation of a straight line in slope-intercept form. Solve this equation for x.

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CCSS.HSA.CED.A.4

Solving the formula P = 2L + 2W for W is not equivalent to which equation?

• (P-2L)/2 = W

• (P/2) - (2L/2) = W

• (1/2)P - L = W

• P - (1/2)L = W

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CCSS.HSA.CED.A.4

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What is the first step in solving for a variable?

• Use inverse operations to undo operations and isolate the variable.

• Identify the operations on this variable and the order in which they are applied.

• Locate the variable you are asked to solve for in the equation.

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CCSS.HSA.REI.A.1

If the formula to find the Area of a rectangle is A = l x w, what is the formula to find the Length of a rectangle?

• l = A x w

• l = A / w

• l = A + w

• l = A - w

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CCSS.HSA.CED.A.4