Question

Sarah is buying packages with 7 marbles each. Her friend gave her 19 more marbles. Now, she has 40 marbles. How many packages did she buy?

Hint: Use an equation in the form px + q = r to represent the problem in order to solve it. Write the result of the solved equation below.

Answer 1

Let x = number of packages. Equation: 7x + 19 = 40.

Solve: 7x = 40 − 19 = 21, so x = 21 ÷ 7 = 3.

She bought 3 packages.