Math 7 - Writing & Solving Equations

 $-15=-4m+5$  

• 4

• 7

• 5

Choose the equation that represents the equation below:

Jason spent $25 on a movie ticket and some candy bars. If the movie ticket cost $7 and each candy bar cost $3, then how many candy bars did she buy?

• $7c-3=25$

• $7+3c=25$

• $7c+3=25$

• $7-3c=25$

A cell phone company charges $3.00 to make a phone call plus $0.15 for each minute for each minute you talk. Which equation would you use to determine the number of minutes, m, you talked if your bill was $54?

• 54 = 3.00 - 0.15m

• 54 = 0.15 + 3.00m

• 3.00 = 54 + 0.15m

• 54 = 0.15m + 3

 $9x-7=-7$  

• 4

• 0

• 5

• -1.5

What is the first step in solving the following equation?
3x - 5 = 20

• multiply both sides by 5
• add 5 to both sides
• divide both sides by 5
• subtract both sides by 5

Which equation matches the following situation? 331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students, n, were in each bus?

• 6n + 7 =331

• 6n - 7 =331

• 7n - 6 = 331

• 7n + 6 = 331

-3m = -18

• 6
• -6
• 4

solve for x

• 5
• -25
• 15
• 1/5

An electrician charges $90 per hour plus a $50 booking fee. The total bill was $155. Which equation could be used to represent the number of hours, x, the electrician worked.

• 155 = 50 - 90x

• 155= 90x + 50

• 155 = -50x + 90

• 155 = -90 - 50x

 $-12=-\frac{2}{5}t$  

• -30

• 30

•  $4\ \frac{4}{5}$