Carnegie Writing and Solving Equations

Which equation matches this situation?
Diego is saving money for concert tickets to Melanie Martinez, after mowing lawns he has a $120. He already has $46 saved and earned $15 per lawn.

• 46 + 15x = 120

• 15x + 46 = 120

• 120 = 46x - 15

• 120 = 46x = 15

Write an equation and solve for this situation?  Jeff bought Takis for $3.  He also bought some drinks for $2.50 each.  He spent $15.50 total on the Takis and drinks.  How many drinks did he buy?

• 3

• 4

• 5

• 6

Solve for x.
3x + 7 = 31

• 6

• 8

• 10

• 7

What is the value of x in this equation?
3x - 13 = 17

• 3333

• 2

• 10

• none of the above

7b = 42

• b = 5

• b = 6

• b = 7

• b= 8

Solve the equation
3x = 27. 

• x = 24

• x = 81

• x = 9

Oshgosh would like to buy a new pair of skates for $115. So far he has saved $40. If he earns $7.50 per hour, how could I find out how many hours he must work in order to buy the skates?

• 40 + 7.50x = 115

• 40x + 7.50 = 115

• 40 + 7.50 = 115

• 40 + 17.50x = 115

At Gamestop you can buy a Xbox One for $150.00 and each game to go with it would cost $24.00. Or, you can buy a Playstation 4 for $180.00 and each game for $20.00. Write an equation to determine how many games would need to be purchased for the cost to be equal?

• 150x + 24 = 180 + 20x

• 150 + 24x = 180 + 20x

• 180 - 150 = 24 x + 20x

• 150 - 24x = 180 - 20x

Solve the equation: 20.5 = x + 4

• x = 24. 5

• x = 16. 05

• x = 16.5

• x = 24. 05

Solve for x. 
5x - 10 = x + 6

• No solution

• x = 1

• x = 2

• x = 4