Use a Problem Solving Strategy: exemplo 9.10

Problema e solução em inglês, como no livro original.

Find three consecutive integers whose sum is $42 .$

Resolva no papel primeiro. Depois abra a solução um passo de cada vez e pare assim que conseguir terminar sozinho.

Sua vez

O Try It do livro logo depois deste exemplo: mesma ideia, outros números. Só a resposta é dada.

Find three consecutive integers whose sum is $96 .$

Como foi?

Step 1. Read the problem.
Step 2. Identify what you are looking for.		three consecutive integers
Step 3. Name.		Let n = 1^st integer n + 1 = 2^nd consecutive integer n + 2 = 3^rd consecutive integer
Step 4. Translate. Restate as one sentence. Translate into an equation.
Step 5. Solve the equation.
Combine like terms.
Subtract 3 from each side.
Divide each side by 3.
Substitute to get the second number.


Substitute to get the third number.


Step 6. Check:
Step 7. Answer the question.		The three consecutive integers are 13, 14, and 15.

Step 1. Read the problem.
Step 2. Identify what you are looking for.		three consecutive integers
Step 3. Name.		Let n = 1^st integer n + 1 = 2^nd consecutive integer n + 2 = 3^rd consecutive integer
Step 4. Translate. Restate as one sentence. Translate into an equation.
Step 5. Solve the equation.
Combine like terms.
Subtract 3 from each side.
Divide each side by 3.
Substitute to get the second number.


Substitute to get the third number.


Step 6. Check:
Step 7. Answer the question.		The three consecutive integers are 13, 14, and 15.