https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-7th-evaluating-expressions-word-problems/v/evaluate-a-formula-using-substitution 2021-06-30T17:51:06Z Evaluating expressions with variables: temperature In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us! Sal Khan video https://cdn.kastatic.org/googleusercontent/berneDrmbVmpp3eBuZn-mtURjYdLV3K8ovSZ6o5a8NdNWQjjWcEc36yJ_bLnf3jhxnMelCY8PxMieual5SwiM5E Evaluating expressions with variables: temperature In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us! https://cdn.kastatic.org/ka-youtube-converted/tC1SfxRvtmM.mp4/tC1SfxRvtmM.mp4 75 Finding the value of an expression https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foundation-algebra/x2f8bb11595b61c86:intro-variables/e/evaluating_expressions_1 2025-03-28T07:05:36.573142233Z Evaluating expressions with one variable Substitute a whole number into an expression with 1 or 2 operations (addition, subtraction, multiplication, and division), and evaluate. Marcia Lee exercise https://www.khanacademy.org/math/math-nsdc-eng/x0a43a548b892fe12:algebra/x0a43a548b892fe12:evaluating-expressions/v/evaluating-expressions-with-two-variables 2020-10-07T19:09:55Z Example: Evaluating expressions with 2 variables Evaluating Expressions with Two Variables Sal Khan video https://cdn.kastatic.org/googleusercontent/4hviVdwglifhpanxFwaV6idaGugdwRhEwpXOb2v2WJsjEc5u8qnZAuNGYkbQW2NYNRKhTt3K34Q6mPAGZ0jyWuJemQ Example: Evaluating expressions with 2 variables Evaluating Expressions with Two Variables https://cdn.kastatic.org/ka-youtube-converted/BXHNzUaIRR0.mp4/BXHNzUaIRR0.mp4 106 Finding the value of an expression https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foundation-algebra/x2f8bb11595b61c86:substitute-evaluate-expression/e/evaluating_expressions_2 2026-04-02T16:00:53.810662107Z Evaluating expressions with multiple variables Practice evaluating expressions in two variables by plugging in values for the variables.  Omar Rizwan exercise