How to Write an Equation

Write an equation to solve the problem. Kaya rented a limousine for prom. There was a one-time charge of $100, plus an hourly rate of $45. Her total cost for the night was $347.50. How many hours did Kaya rent the limo for?

• 347.50 = 100x + 45

• 347.50 = 45x + 100

• 347.50 - 100 = 45x

• 347.50 + 45x = 100

Write an equation to solve the problem.

At a pizza eating competition, Davonne at two more than twice as many slices as the runner-up. If Davonne at 11 slices, then how many slices did the runner-up eat?

*This question has more than one correct answer*

• 11 = 2r + 2

• 11 + 2 = 2r

• 11 - 2 = 2r

• 2r + 2 = 11

Write an equation to solve the problem. Ronnie charged his customers a flat fee of $25 to fix computers. Then he charged $20 for each hour that he spent fixing the computer. If Ronnie made $175 off of his first customer, how many hours did he spend working?

• 20c - 25 = 175

• c/20 + 25 = 175

• 20c + 25 = 175

Krissa exercises daily by walking. She aims to walk at a steady rate of 3.4 miles per hour.

If t represents time in hours and d represents distance in miles, write an equation that models the relationship between these variables. d=

Each nickel is worth $0.05. 

Write an equation for the number of nickels when the total amount of money in nickels is $2.25.

• n = 2.25(0.05)

• 2.25n = 0.05

• 0.05n = 2.25

What equation matches this situation?
John wants to buy an MP3 Player that costs $30.98.  How much change did he receive if he gives the cashier $40.

• 40 + c = 30.98

• 30.98 + c = 40

• c - 40 = 30.98

• c - 30.98 = 40

Write an equation models the following statement:
 17 less than h equals 42

• 17-h=42

• h-17=42

• h+17=42

• 17+h=42

In the equation x + 7 = 12 7 is being added to the variable, x. How should you show your work to isolate the variable and solve the equation?

• Subtract 7 from both sides. The solution is x = 5.

• Add 7 to both sides.

  The solution is x = 19.

• Multiply both sides by 7 The solution is x = 84.

WRITE AN EQUATION

331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were in each bus?

• 7x+6=331

• 13x=331

• 6x+7=331

• 331-7=6x

WRITE AN EQUATION Aliyah had $24 to spend on seven pencils. After buying them she had $10. How much did each pencil cost?

• 24-10=7x

• 7x- 24=10

• 7x+ 10=24

• 10+x=14