lesson 1.4 equations and inequalities goal: to learn how to solve equations and check solutions of...
TRANSCRIPT
Lesson 1.4Equations and Inequalities
Goal: To learn how to solve equations and check solutions of
equations and inequalities.
Equations
• An EQUATION is a statement formed by placing an equal “=“ sign between two expressions.
• An equations has a left and a right side.
• EX: 4x + 1 = 9
Solving Equations
• Finding all the solutions of an equation is called SOLVING the equations.
• Some are easy enough to be solved using Mental Math.
Solutions
• When the variable in an equation is replaced by a number, the resulting statement is either true or false. If the statement is true, the number is a SOLUTION of the equation.
• EX: 4x + 1 = 9
“2” is the solution to this problem.
Guided Practice Problems• Solve the following:
2x=10
4=x – 3
2 + x = 6
X = 13
Page 25
• Complete # 1-4
• Be careful with #1. Don’t leave the Variable as a negative.
Inequality
• An Inequality is a statement formed by placing an inequality symbol, such as “<“ or “>” between two expressions.
< is less than
< is less than or equal to
> is greater than or equal to
> is greater than
Inequalities
• Inequalities can have MORE THAN ONE ANSWER [solution]!!!
• P. 26 Complete #6-9
• Write if the answer is a solution or not a solution.
Home Work
P. 27 #26-42