Lesson 21 Solve One Variable Equations

Front

What is a one-variable equation?

Back

A one-variable equation is an equation that contains only one variable, such as x or V, and can be solved to find the value of that variable.

Front

What is the first step to solve the equation V + 23 = 45?

Back

Subtract 23 from both sides to isolate V.

Front

What is the solution to the equation V + 23 = 45?

Back

V = 22.

Front

How do you model a situation where you need to find the original number of students before some joined?

Back

Use the equation n + 4 = 32, where n is the original number of students.

Front

What is the correct operation to isolate the variable in the equation 15 = m - 5?

Back

Add 5 to both sides.

Front

What is the solution to the equation 15 = m - 5?

Back

m = 20.

Front

How do you represent the situation where Marcus needs to sell 25 tickets and has sold 9?

Back

Use the equation t + 9 = 25, where t is the number of tickets still needed to sell.

Front

What is the solution to the equation t + 9 = 25?

Back

t = 16.

Front

What does it mean to 'solve for a variable'?

Back

To solve for a variable means to find the value of that variable that makes the equation true.

Front

What is the purpose of balancing an equation?

Back

Balancing an equation ensures that both sides remain equal when performing operations.