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Variables
Algebraic Expressions 1
Algebraic Equations 2
Subtraction
Random
100
What is an example of a variable?
x y n z k
100

Write the algebraic expression: The sum of fifteen and a number

15 + x 

100
Write the algebraic equation: Five times a number is eighty.
5x = 80
100

Write the algebraic expression: Ten minus a number is three

10 - x = 3

100
What operation should you use with the key word: "Decreased by"
Subtraction
200

In -3x2 + 5

What is the variable, the coefficient, the constant, the exponent

variable is x
coefficient is -3

constant is 5

exponent is 2

200
Write the algebraic expression: The product of eight and a number
8x
200

Write the algebraic equation: Twenty-one more than a number is thirty

x + 21 = 30 

200

Write the algebraic expression: The difference between a number and 5

x - 5

200
Is there a difference between the variable n and x?
No.
300
What is variable in this expression? x + 10 = 35
x
300

Write the algebraic expression: The quotient of forty five and a number

45 / x

300

Write the algebraic equation: Forty divided by a number is ten.

40 / x = 10

300

Write the algebraic equation: Three hundred decreased by a number is two hundred

300 - x = 200

300
What key word tells you to use the equal sign?
Is
400

What algebra expression is "a number"? Ex: The difference between a number and five

Use a variable like x or n etc.

400

Write the algebraic expression: Ten increased by a number

10 + x 

400

Write the algebraic equation: Eighteen decreased by a number is two

8 - x = 2

400

Write the algebraic equation: Ninety less than a number is ten

x - 90 = 10

400

Write the algebraic equation: Fifty split by a number is two

50 / x = 2

500
What are the variables in this equation? a + b = 12
a and b
500
Write the algebraic expression: Double a number
2x
500
Write the algebraic equation: Twice a number is fifty
2x = 50
500

Write the algebraic equation: Sixty decreased by a number is twelve

60 - x = 12

500

Write the algebraic equation: Twelve less than a number is twenty-one.

x - 12 = 21

600

What is the definition of a variable?

A letter that represents a number

600

the sum of double a number and six , squared

(2x+6)2

600

The sum of 6 and a number squared is fifty-five

6+x2 = 55

600

The difference between 4 and a number and three times a number

4-x=3

600

Paul and Mary together sold forty-five cookies
Paul sold 3 times more than Mary plus 7.

Which person would be x in the algebraic equation and what would be the value of x?



Mary is x   / Paul is (3x + 7)

Equation :
Paul + Mary = 45
(3x+7) + x = 45

x=12