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Warm ups - PEMDAS

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**3-2 Solving Equations with Multiplication and Division**

Objective: To solve equations using multiplication and division

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**Examples 1 – 3 (watch & listen)**

x = 3 -4r = -28 3w = -11 w = -11 3

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Examples 4 – 6 (do with me)

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**Example 7 (with a partner)**

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**Examples 8 - 9 Six times a number is -96. Find the number. 6n = -96**

n = -16 Negative twelve times a number is Find the number.

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

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**Check your answers in the back of the book.**

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

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**Objective The student will be able to:**

solve equations using multiplication and division.

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**To get the variable by itself, which number needs to be moved?**

1) Solve t = 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

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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

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**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.

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**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

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**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?

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Try these on your own... 15

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The answers...

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