3-7 Solving Fraction Equations: Multiplication

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Presentation transcript:

3-7 Solving Fraction Equations: Multiplication Course 1 Note: Unit 3 Test: Tuesday Nov. 15 Warm Up Lesson: Solving Equations by Multiplying and Dividing Worksheet and Homework

3-7 Solving Fraction Equations: Multiplication Warm Up Solve. Course 1 3-7 Solving Fraction Equations: Multiplication Warm Up Solve. 1. x – 5 = 17 2. 5x = 125 3. x + 12 = 86 4. 9x = 108 x = 22 x = 25 x = 74 x = 12

3-7 Learn to solve equations by multiplying and dividing fractions. Course 1 3-7 Solving Fraction Equations: Multiplication Learn to solve equations by multiplying and dividing fractions.

3-7 Solving Fraction Equations: Multiplication Remember! Course 1 3-7 Solving Fraction Equations: Multiplication Dividing by a number is the same as multiplying by its reciprocal. Remember!

Additional Example 1A: Solving Equations by Multiplying and Dividing Course 1 3-7 Solving Fraction Equations: Multiplication Additional Example 1A: Solving Equations by Multiplying and Dividing Solve the equation. Write the answer in simplest form. 2 5 __ A. 7x = 7x 1 __ 1 7 __ 2 5 __ 1 7 __ • = • Multiply both sides by the reciprocal of 7. 2 • 1 5 • 7 ____ x = 2 35 __ x = The answer is in simplest form.

Additional Example 1B: Solving Equations by Multiplying and Dividing Course 1 3-7 Solving Fraction Equations: Multiplication Additional Example 1B: Solving Equations by Multiplying and Dividing Solve the equation. Write the answer in simplest form. 5y 8 __ B. = 6 5 8 __ 5y 8 __ 5 8 __ 6 1 __ 5 8 __ ÷ = ÷ Divide both sides by . 5 8 Multiply by the reciprocal of . __ 5y 8 __ 8 5 __ 6 1 __ 8 5 __ • = • 48 5 __ 3 5 __ y = , or 9

3-7 Solving Fraction Equations: Multiplication Try This: Example 1B Course 1 3-7 Solving Fraction Equations: Multiplication Try This: Example 1B Solve the equation. Write the answer in simplest form. 1 7 __ B. 3x = 3x 1 __ 1 3 __ 1 7 __ 1 3 __ • = • Multiply both sides by the reciprocal of 3. 1 • 1 7 • 3 ____ x = 1 21 __ x = The answer is in simplest form.

Homework Pg. 270-271 # 1-19 odd, 21, 23-27 odd, 37, 39