1. Textbook pages 69 & 73 IAN pages 91 & 95

2. Each side of the equation must be balanced. We balance an equation by doing the same thing to both sides of the equal sign.

3. Example 1 Solve each equation. Check your answers. Solving Multiplication Equations (A) 3x = 12 Do the opposite ÷3 Do the same thing to both sides of the equation. x = 4 3(4 ) = 12 To check your work, substitute in the value of x. ÷3

4. Example 1 Solve each equation. Check your answers. Solving Multiplication Equations (B) 8 = (-4)w Do the opposite Do the same thing to both sides of the equation. ÷ (-4) -2 = w 8 = (-4)(-2) To check your work, substitute in the value of w. ÷ (-4)

5. 1. 7x = 21 2. -27 = 3w 3. 90 = 10a 4. -56 = 7b 5. 3c = 33 6. 12 = (-2)n x = 3 w = -9 a = 9 b = -8 c = 11 n = -6

6. Example 1 Solve each equation. Check your answers. Solving Division Equations (A) y/5 = 4 Do the opposite * 5 Do the same thing to both sides of the equation. * 5 y = 20 20 /5 = 4 To check your work, substitute in the value of y.

7. Example 1 Solve each equation. Check your answers. Solving Division Equations (B) (-12) = z/4 Do the opposite * 4 Do the same thing to both sides of the equation. * 4 -48 = z -12 = (-48)/4 To check your work, substitute in the value of y.

8. 1. y/4 = 3 2. -14 = z/2 3. -30 = c/(-6) 4. -14 = b/5 5. r/9 = -7 6. 12 = n/3 y = 12 z = -28 c = 180 b = -70 r = -63 n = 36