Slide 1
March 1, 2006 Mr. Galilei Monessen High School
Algebraic Equations
SOLVING MULTI-STEP EQUATIONS
Slide 2
Algebraic Equations
2x 4 = 8
+4
+4
2x
=
12
2
2
x
=
6
Slide 3
Algebraic Equations
5x + 10 = 80
-10
-10
5x
=
70
5
5
x
=
14
Slide 4
Algebraic Equations
Multiplication with Subtraction
-3x 4 = -82
+4
+4
-3x
=
-78
-3
-3
x
=
26
Slide 5
Algebraic Equations
Multiplication with Addition
2/3x + 2 = 8
-2
-2
x
=
6
x
=
18/2 = 9
(HINT)
Reciprocal
Slide 6
Algebraic Equations
Division with Addition
x/5 + 2 = 8
-2
-2
=
6
x
=
30
Slide 7
Algebraic Equations
-20
-20
10x
=
60
10
4x +6x + 20 = 80
10x + 20 = 80
10
x = 6
Slide 8
Algebraic Equations
C.L.T.
-12
-12
5x
=
80
5
3x + 2x + 20 - 8 = 92
5x + 12 = 92
5
x = 16
Slide 9
Algebraic Equations
C.L.T.
-12
-12
2x + 12
=
122
2
6x + 15 = 125 + 4x
6x 4x + 12 = 122 + 4x 4x
2
2x = 110
( )
( )
X = 55
Slide 10
( )
10x 3x -12 = 4x 9x + 48
Algebraic Equations
2(5x 6) 3x = 4(x + 12) 9x
10x 12 - 3x = 4x + 48 9x
( )
( )
Slide 11
12
12
+12
+12
X = 5
Slide 12
THE END
Homework:
Study Review Sheet
Test Tomorrow!!
Use Worksheets & Notes to review and practice for the test.