Writing and solving equations

When solving an equation, our goal is to:

• add all the numbers together.
• use a calculator.
• eat lunch.
• isolate the variable to solve.

Which of the following is an equation?

• 4x - 7
• 3 - 7t
• 7x = 49
• 43x - 9

When solving 234 + N =389, what operation would you use to find the answer

• multiplication
• addition
• subtraction
• division

Laney pays $0.99 for each song she downloads from the Internet. In total, she paid $24.75 for songs from the Internet. How many songs does Laney download? 

• 20 songs
• 25 songs
• 30 songs
• 35 songs

What is the difference between an expression and an equation?

• expressions have an equal sign and equations do not have an equal sign

• expressions do not have an equal sign and equations do have an equal sign.

• expressions do not have variables and equations have variables

• there is no difference

The number of pencils collected by Precious (P) is equal to 5 more than twice the number collected by D'Shaun (D). Which of the following equations describes the statement above?

• P = 5 - D
• P = D + 5
• P = 2D - 5
• P = 2D + 5

Destiny rented a canoe for 3 hours. She also paid $24 for snacks and drinks. The total amount Destiny paid was $78. How much money did she spend each hour on the canoe?

• $51
• $34
• $26
• $18

Lakeland Theater sold tickets to a play for $5 each. They also made $55 in soda and popcorn sales. If the theater made a total of $290, how many tickets were sold?

• 47
• 58
• 69
• 113

Tyrell needs $60 to purchase a trumpet. He has $32. He can earn $4 an hour babysitting. Which equation could be used to find h, the number of hours Tyrell needs to babysit to earn enough money to purchase the trumpet?

• 60 = 32 + 4h
• 60 = 32 - 4h
• 60 = (32 x 4)h
• 60 = (32/4)h

Pearl bought 3 copies of a book from a catalog. The total cost for the books was $9.00, which includes $1.50 for shipping. How much did each copy of the book cost?

• $1.50
• $2.50
• $3.00
• $4.50