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Chapter 2 Section 1

Chapter 2 Section 1. Solving Equations. Equations. Decide which are Equations and which are Expressions. Solution of an Equation. To determine if a value is a solution, we simply substitute the value for the variable in the equation and see if the result is a true statement. Your Turn.

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Chapter 2 Section 1

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  1. Chapter 2 Section 1 Solving Equations

  2. Equations Decide which are Equations and which are Expressions

  3. Solution of an Equation • To determine if a value is a solution, we simply substitute the value for the variable in the equation and see if the result is a true statement.

  4. Your Turn • Determine if the value is a solution

  5. The Principles • The Addition Principle: If we add the same amount to both sides of an equation, the result is an equivalent equation.a = b is equivalent to a + c = b + c • Multiplication Principle: If we multiply the same non-zero amount to both sides of an equation, the result is an equivalent equation.a = b is equivalent to ac = bc

  6. Your Turn

  7. Your Turn

  8. Activity #2 • We are going to work a problem on a separate sheet that is an in class group activity. These activities count as a quiz in the grade book. • Form into groups of three. Take a minute and introduce yourself and tell the person how the class is going for you and any ideas on how to succeed in math  • We will take about three minutes or so to work on the problem solo, then as a group. It is OK if you don’t get it right away!!

  9. Cookies! • Elliot bought some cookies. On his way home he gave ½ of them and ½ a cookie to his mom. He ran into his aunt on his way to CR and gave her ½ of the remaining cookies and ½ of a cookie. Just before coming to class he was stopped by an old friend and he gave her ½ of the remaining cookies and ½ of a cookie. When he got to his desk he had ½ dozen cookies left. How many did he start with?

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