Test PracticeT
C 32. OPEN ENDED Write a real-world problem that could be solved by using
the equation 4x + 8 = 2 x + 32. Then solve the equation.- CHALLENGE If 4x + 2 = y and 3x - 1 = y, find the value of y.
- E WRITE MATH Explain how to solve 2 - 4 x = 6 x - 8.
Solve each equation. Check your solution. (Lesson 3B)- 6 + 2 x = 16 39. 5 + 3 n = - 4 40. - 3 = 4 k + 9 41. 9 = 5 y + 12
- BOOKS Of the books on a shelf, _^23 are mysteries. Write and solve an
equation to find how many books are on the shelf when there are
10 mystery books. (Lesson 2D) - BAR DIAGRAMS Use the bar diagram to find n the
number of guests who still have not replied about
attending the party. How many guests have still
not replied? (Lesson 1D)
Lesson 3D Multi-Step Equations 239- Rena spent $18 including tax on ribbon
she bought at a craft store. The price of
the ribbon, including tax, was $3 for two
spools. In the equation 18 = r(3 ÷ 2),
r represents the number of spools of
ribbon Rena bought. How many spools
of ribbon did Rena buy?
A. 6 C. 18
B. 12 D. 36 - SHORT RESPONSE Gary bought a box
of 230 tennis balls for $110. He made a
profit of $97 after selling all the balls. Each
ball was sold at the same price. Use the
equation below to find b, the selling price
of one ball.
230 b - 110 = 97- EXTENDED RESPONSE Damian and
Sergio bought the baseball cards
shown in the table. Sergio also bought
gum that cost $0.99. All of the cards cost
the same and the boys spent the same
amount of money.
Boy Number of Cards of GumPacks
Sergio 12 1
Damian 15 0Part A Write an equation to represent
the situation.
Part B Solve the equation from Part A.
Explain the solution.
Part C How many cards could Sergio
buy if he bought 2 packs of gum but
spent the same amount of money?42 guests invited34 nguests replied228_239_C04L3_895130.indd 239 12/31/09 4:00 PM