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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

Chapter 2 Section 1

Solving Equations

equations
Equations

Decide which are Equations and which are Expressions

solution of an equation
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
Your Turn
  • Determine if the value is a solution
the principles
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
activity 2
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!!
cookies
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?