Download Lesson 1.4 Equations and Inequalities

Lesson 1.4
Equations 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=1
3
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