Warm ups - PEMDAS

3-2 Solving Equations with Multiplication and Division Objective: To solve equations using multiplication and division

Examples 1 – 3 (watch & listen) 5 5 x = 3 -4r = -28 3w = -11 3 3 w = -11 3

Examples 4 – 6 (do with me)

Example 7 (with a partner)

Examples 8 - 9 Six times a number is -96. Find the number. 6n = -96 6 6 n = -16 Negative twelve times a number is -156. Find the number.

TOO (Try on your own) 1) -3x = -24 2) 3)

Check your answers in the back of the book. Homework Pg. 153 # 15 – 31 odd Check your answers in the back of the book.

Objective The student will be able to: solve equations using multiplication and division.

To get the variable by itself, which number needs to be moved? 1) Solve. -5t = 60 To get the variable by itself, which number needs to be moved? -5 To move the -5, you have to do the opposite operation. What operation will we use? division

1) Solve -5t = 60 -5 -5 t = -12 -5(-12) = 60 Draw “the river” to separate the equation into 2 sides Divide both sides by -5 Simplify Check your answer

4) Solve You don’t like fractions? Let’s get rid of them!  “Clear the fraction” by multiplying both sides of the equation by the denominator.

4 · · 4 x = -48 4) Solve Draw “the river” Clear the fraction – multiply both sides by 4 Simplify Check your answer 4 · · 4 x = -48

Math Lab Homework Please finish worksheets from yesterday Why did the ant run across the cracker box? What did the Spanish Farmer say to his chicken?

Try these on your own... 15

The answers...