Equations - Writing and solving

Scott's Automotive charges $35 for each car plus $7 per hour. Write an equation that represents this scenario if Kylie was charged $63.

• 35x + 7 = 63

• 7x = 63

• 7x - 35 = 63

• 7x + 35 = 63

Amy had $26 dollars to spend on school supplies. After buying 10 pens at the same price, she had $14.30 left. Write an equation to determine how much each pen cost.

• 14.30/p + 10 = 26

• 26/p = 24.30

• 10p - 14.30 = 26

• 10p + 14.30 = 26

Mallory bought pizza and soda for a party. If she spent $12.57 on the sodas and $10.95 for each pizza, how many pizzas did she buy if her total is $89.22?

• 10.95x + 12.57 = 89.22

• 12.57x + 10.95 = 89.22

• 89.22x -10.95 = 12.57

• 12.57 + 10.95 = 89.22

Pizzazz Publications is having some books printed. The printer charges $800 plus $5 per book. What equation could help me find how many books can be printed for $4,000?

• 5x + 800 = 4000

• 800x + 5 = 4000
• 4000 + 5x= 800
• 800 + 5 = 4000

The space club is having some posters printed. The printer charges $250 plus $2 per poster. How can I figure out how many posters I could print for $1,000?

• 250x + 2 = 1000
• 1000 + 2x = 250
• 250 - 2x = 1000
• 2x + 250 = 1000

Mr. Piper's plumbing needed repairs. The plumber charged $98 for parts plus $45 per hour for labor. If the bill totaled $458, how could I find out the hours of labored required?

• 98x + 45 = 458
• 45x + 98 = 458

• 45 + 98 = 458
• 45x - 98 = 458

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?

• 7.50x + 40 = 115

• 40x + 7.50 = 115
• 40 + 7.50 = 115
• 40 + 17.50x = 115

Jazmine joined a music club. The start up fee was $10 and each song she downloads(m) is $0.99. If she spent a total of $15.94, how many songs did she download? Which equation models this situation?

• $10 - $0.99m = $15.94

• $10 + $0.99m = $15.94

• $10/$0.99m = $15.94

• $10m + $0.99m = $15.94

Penny is going to the carnival to ride the rides. Admission is $20 and ride tickets are $0.50 each. Write an equation that represents this scenario if she spends $35 in all.

• 0.50 + 20x = 35

• 0.50x = 35

• 0.50x + 20 = 35

• 0.50x - 20 = 35

Nina's coworkers gave her money to bring in breakfast for everyone. She spends $19 on bagels, cream cheese and juice and spends the rest on grapes, which were $1.47 per pound. She spent $23. Which equation shows how many pounds of grapes(g) Nina purchased?

• 23 + 19 = 1.47g

• 1.47g + 19 = 23

• 19 - 1.47g = 23

• 23 = 19g - 1.47