Creating Equations with Variables

The product of 12 and a number is the same as 2 removed from a number

• 12x=x+2

• 12x=2-x

• 12-2=x-2

• 12x= x-2

a number halved is equal to 22 fewer than a number

• b⁄2 = 22-b

• 2b =22- b

• n⁄2=n-22

• None of the above

120 more than twice a number is the same as halve a number removed from 8

• 2t+120= t⁄2-8

• 120+2t = t⁄2-8

• 2t+120 = 8-t⁄2

• Be humble...sit down

Mrs. Rucker made 24 tacos. Her family ate 13 of them. Then Mrs. Rucker made 12 more tacos. Which equation can be used to find t, the number of tacos she had then?

• 24 + 13 - 12 = t

• 24 + 13 + 12 = t

• 24 - 13 + 12 = t

• 24 - 13 - 12 = t

• A

• B

• C

• D

Raymond buys bottles of water at $2 each and a large pizza at $13. The total cost was $21. How many bottles of water did Raymond buy?
What is the correct equation to solve?

• 2b + 13 = 21

• 2 + 13b = 21

• 2 + 13 = 21b

• 2b +21 = 13

A plant is 5cm tall and growing at a rate of 3cm a month. The equation is y=3x+5. What does x represent in this situation?

• centimeters

• amount of months

• How tall the plant is

• the original height of the plant

• a variable

A letter or symbol that represents an unknown value is called ______________.

• Variable

• Radicand

• Coefficient

• Constant

A taxi charges a fixed fee plus a charge per mile (x = miles). The total cost can be calculated with the equation:

y = 2.75x + 4.25

What does x represent?

• The total cost of the fixed fee plus charge per mile

• The charge per mile

• Miles

• The fixed fee

• Karma

• F
• G
• H
• J