4-3 Write and Solve Addition and Subtraction Equations

Front

Increased means...

Back

addition

Front

Is means...

Back

equals

Front

x - 62 = 123. How should you show your work to isolate the variable?

Back

Add 62 to each side.

Front

Using the 'opposite operation' to 'undo' and isolate the variable when solving an equation is more commonly called...

Back

Inverse operations

Front

x - 32 = 49. What is the value of x?

Back

x = 81

Front

What is the opposite operation of addition?

Back

Subtraction

Front

What is the opposite operation of subtraction?

Back

Addition

Front

What does it mean to isolate a variable?

Back

To get the variable alone on one side of the equation.

Front

If x + 15 = 30, what is x?

Back

x = 15

Front

What is an equation?

Back

A mathematical statement that two expressions are equal.