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Ch. 3.1 continued Solving an equation with negative coefficients: EXAMPLE 1 EXAMPLE 2

Ch. 3.1 continued Solving an equation with negative coefficients: EXAMPLE 1 EXAMPLE 2 Solve: 7 – 4y = 19 Solve 12 – 4s = -12 7 – 4y = 19 12 -4s = -12 -7 -7 -12 -12 -4y = 12 -4s = -24 -4 -4 -4 -4

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Ch. 3.1 continued Solving an equation with negative coefficients: EXAMPLE 1 EXAMPLE 2

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  1. Ch. 3.1 continued Solving an equation with negative coefficients: EXAMPLE 1 EXAMPLE 2 Solve: 7 – 4y = 19 Solve 12 – 4s = -12 7 – 4y = 19 12 -4s = -12 -7 -7 -12 -12 -4y = 12 -4s = -24 -4 -4 -4 -4 y = -3 s = 6

  2. EXAMPLE 3 5 – X = 198

  3. EXAMPLE 3 -4 + 3m = 29 +4 +4 3m = 33 3 3 m = 11

  4. Practice on your own! 6 – 2m = 8

  5. -2 = 5 - n

  6. 20 – 12m = 44

  7. – 2y + 11 = 31

  8. Word problems involving two-step equations You are buying a drum set that costs $495. The music store lets you make a down payment. You can pay the remaining cost in three equal monthly payments with no interest charged. You make a down payment of $150. How much is each monthly payment? Set up your equation: 150 + 3p = 495 Solve: 150 + 3p = 495 -150 -150 3p = 345 3 3 p = 115 • What is the important information? • Costs $495 • Down payment of $150 • I have 3 months to pay remaining amount ($495 - $150)

  9. Word problems involving two-step equations You go to a local candy store to purchase some rock candy and chocolate bars. You have a total of $5 in your pocket to spend. If you purchase one bag of rock candy for $1.75, how many chocolate bars can you purchase if each chocolate bar costs $1.50?

  10. Homework Page 123 #’s 5-6, 15-22, 28, 32-33, 46

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