Anticipatory Set/Warmup : Transparency 3-3
Solve each equation. Then check your solution.
1. z - 11 = 15
2. 2.4 + w = -1.9
3. 28 = x - (-5)
4. Write an equation for a number decreased by - 4 is equal to 15. Then solve the equation.
5. A farmer planted 3.5 more acres of corn this year than last year. If he planted 20 acres of corn this year, write an equation to find the number of acres he planted last year. Solve the equation.
6. Which equation is not equivalent to a + 8 = - 20?
A) -36 = a - 8     B) - 30 = a - 2     C) a + 20 = 8     D) a + 16 = - 12.

Multiplication Property of Equality
for any numbers a, b, and c, if a = b, then ac = bc.

Example 1: Solve (x/2) = (3/4). Then check your solution.

Example 2: Solve (-3 3/8)k =1 4/5.

Example 3: Solve -75 = -15b

Division Property of Equality
for any numbers a, b, and c, with c ≠ 0, if a = b, then (a/c) = (b/c)

Example 4: Solve 11w = 143. Then check your solution.

Example 5: Solve -8x = 96

Example 6: Write an equation for the problem below. Then solve the equation.
Negative fourteen times a number equals 224

Homework: p 138 # 3, 14-41(3rd), 43-49 all
Quiz 3:1-3 in two days