1. Ch2.5_Multi­step_Equations.notebook September 15, 2011
Chapter 2.5
Solving Multi­Step Equations
Like Terms
Combine terms that have the same variables
7 apples + 2 bananas + 3 oranges ­ 2 apples + 1 orange ­ 1 banana
7x + 3y + 1 ­ 4z + 8y ­ x + 2z ­ 4
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2. Ch2.5_Multi­step_Equations.notebook September 15, 2011
2.5 Multi­Step Equations
If there are (), then you
will have to distribute
On each side, add like terms
Move variables to one side and
constants to the other side
Divide or multiply to solve for the
variable.
check your work! (plug back in)
Example
Solve for x
x + 5 = 2x + 3
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3. Ch2.5_Multi­step_Equations.notebook September 15, 2011
Example
Solve for y
3(2 + y) = 2y + 7
Example
Solve for x
2(x ­ 3) + 4= x + 8
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4. Ch2.5_Multi­step_Equations.notebook September 15, 2011
Example
Solve for x
1
(4x­10) + 3x= ­5(x ­ 2) + 15
2
Example
Solve for r
­28 = 3r ­ 7
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5. Ch2.5_Multi­step_Equations.notebook September 15, 2011
Example
Solve for a
9(a + 4) ­ 2a = 19 ­ 3(a + 6)
Page 74
2­7 all
12­30 evens
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