Section 3.4 Solving Equations with Variables on Both Sides Mr. Beltz & Mr. Sparks
Section 3.4 Solving Equations with Variables on Both Sides
Jan 22, 2016
Section 3.4 Solving Equations with Variables on Both Sides. Mr. Beltz & Mr. Sparks. Goal:. Solve equations that have variables on both sides. Basics. Get the Variables to one side (either side) Combine Like Terms Solve the Equation using Inverse Relationships - PowerPoint PPT Presentation
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Section 3.4
Solving Equations with Variables on Both
SidesMr. Beltz &Mr. Sparks
Goal: Solve equations that have
variables on both sides.
Basics
Get the Variables to one side (either side)
Combine Like Terms
Solve the Equation using Inverse Relationships
Remember: You always want to solve for the Variable, “X = ?”
7x + 19 = -2x + 55
+2x +2x
9x + 19 = 55
-19 -19
9x = 36
9 9
x = 4
Do the Inverse Relationship to get the Variables on the LEFT SIDE
Simply the Equation
Do the Inverse of Addition [subtraction]
Do the Inverse of Multiplication [Division]
80 – 9y = 6y
+9y +9y
80 = 15y
15 15
16 = y
3
Do the Inverse Relationship to get the Variables on the LEFT SIDE
Simply the Equation
Do the Inverse of Multiplication [Division]
3x – 10 + 4x = 5x – 7
3x + –10 + 4x = 5x + –7
7x + -10 = 5x + -7
-5x -5x
2x + -10 = -7
+10 +10
2x = 3
2 2
X= 3/2
Change – to + Opposite of the next number
Combine Like Terms
Do the Inverse Relationship to get the Variables on the LEFT SIDE
Simply the Equation
Do the Inverse of Subtraction [Addition]
Simply the Equation
Do the Inverse of Multiplication [Division]
Independent Practice
P. 152 #1-4
Independent Practice Answers
#1. x = 2
#2. y = 3
#3. x = -2
#4. x = -4
HW Assignment
P. 154
# 3-8 [all] & 17-33 [ODD]
Friday’s HW
P. 154
# 1, 2, 10-34 [EVEN], 36, 50
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