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Example 2.11 from Elementary Algebra, 2.1 Solve Equations Using the Subtraction and Addition Properties of Equality
Solve Equations Using the Subtraction and Addition Properties of Equality: example 2.11
The MacIntyre family recycled newspapers for two months. The two months of newspapers weighed a total of 57 pounds. The second month, the newspapers weighed 28 pounds. How much did the newspapers weigh the first month?
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
Solution
Your turn
The book's Try It right after this example: same idea, new numbers. Only the answer is given.
Translate into an algebraic equation and solve:
The Pappas family has two cats, Zeus and Athena. Together, they weigh 23 pounds. Zeus weighs 16 pounds. How much does Athena weigh?
How did it go?