Writing and Solving Equations

Front

What is the difference between an expression and an equation?

Back

Expressions do not have an equal sign and equations do have an equal sign.

Front

Translate: 5 less than a number, x, is 15.

Back

x - 5 = 15

Front

Translate into a word sentence: 3x - 8 = 34

Back

Eight less than three times a number is equal to 34.

Front

The cost to download one song, s, from a website is $0.99. Which equation can be used to find t, the total cost for downloading s songs?

Back

t = 0.99s

Front

Solve the equation: 20.5 = x + 4

Back

x = 16.5

Front

What is a variable in an equation?

Back

A symbol (usually a letter) that represents an unknown value.

Front

What does it mean to solve an equation?

Back

To find the value of the variable that makes the equation true.

Front

What is a coefficient in an algebraic expression?

Back

A number that is multiplied by a variable.

Front

Translate: The sum of a number x and 7 is 12.

Back

x + 7 = 12

Front

What is the first step to solve the equation: 2x + 3 = 11?

Back

Subtract 3 from both sides: 2x = 8.