1­3 Day 1 Solving Equations
August 26, 2008
1-3 Day 1 Solving Equations
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Jun 25­6:02 PM
1
1­3 Day 1 Solving Equations
August 26, 2008
Check Skills You'll Need
Simplify each expression:
2. 2y + 7x + y ­ 1
x + y + 2y y
­
3 3 3
5. (x + y) ­ (x ­ y)
3. 10h + 12g ­ 8h ­ 4g
6. ­(3 ­ c) ­ 4(c ­ 1)
4. 1. 5x ­ 9x + 3
Jun 25­6:17 PM
2
1­3 Day 1 Solving Equations
August 26, 2008
Reminder:
You can do anything you would like to
an equation as long as you do it to both
sides!
Example:
x + 3 = 5
­3 ­3
x = 2
Jun 25­6:39 PM
3
1­3 Day 1 Solving Equations
August 26, 2008
Solving an Equation with a Variable on Both Sides
13y + 48 = 8y - 47
Jun 25­6:48 PM
4
1­3 Day 1 Solving Equations
August 26, 2008
Using the Distributive Property
3x - 7(2x - 13) = 3(-2x + 9)
3x - 7(2x - 13) = 3(-2x + 9)
Jun 25­6:52 PM
5
1­3 Day 1 Solving Equations
August 26, 2008
Solving a Formula for One of Its Variables
Solve this formula for the area of a trapezoid for h.
1
A = h (b
1 + b2)
2
Answer
h = 2A
b + b
1
2
Jun 25­6:55 PM
6
1­3 Day 1 Solving Equations
August 26, 2008
Solving an Equation for One of Its Variables
x
x
Solve for x.
+ 1 = a
b
ab
x = a ­ b
Answer
Jun 25­7:01 PM
7
1­3 Day 1 Solving Equations
August 26, 2008
K
R
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M
HO
p. 21 - 22
# 2 - 28 even
# 36 - 46 even
Jun 25­7:09 PM
8