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Splash Screen
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Warm-ups
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1.A 2.B 3.C 4.D Five Minute Check 1 (over Lesson 3-4) A.$18 B.$27 C.$54 D.$36 Solve the problem using the work backward strategy. Miguel spent $6 on fast food. Then he spent $3 on ice cream. After buying some comics, he had $9 left, which was one third of what he had to start with. How much money did Miguel have to start with?
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1.A 2.B 3.C 4.D Five Minute Check 2 (over Lesson 3-4) A.$160 B.$80 C.$200 D.$240 Solve the problem using the work backward strategy. Curtis paid $80 on the vet bill for his dog. Then the vet charged him $40 more for his dog’s medicine. If he now owes the vet $120, what was the starting balance on his bill?
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1.A 2.B 3.C 4.D Five Minute Check 3 (over Lesson 3-4) A.25 B.16 C.18 D.21 Solve the problem using the work backward strategy. A number is divided by 3. Then 5 is added to the quotient. After subtracting 2, the result is 10. What is the number?
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Lesson Menu Main Idea and Vocabulary Example 1:Solve a Two-Step Equation Example 2:Solve Two-Step Equations Example 3:Solve Two-Step Equations
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Main Idea/Vocabulary two-step equation – an equations that has 2 different operations. Solve two-step equations (2.8.8E) (M7.D.2.1).
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Example 1 Solve a Two-Step Equation Solve 4x + 3 = 19. 4x + 3 = 19Write the equation. 4x= 16Simplify. x= 4Simplify. –3 =–3Subtract 3 from each side. Divide each side by 4. Answer: The solution is 4.
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Example 1 Solve a Two-Step Equation Check 4x + 3 = 19Write the original equation. ? 4(4) + 3 = 19Replace x with 4. 19 = 19 BrainPOP: Two-Step Equations 16 + 3 = 19Simplify. ?
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1.A 2.B 3.C 4.D Example 1 Solve 3t – 7 = 14. Check your solution. A. B.7 C.18 D.24
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Example 2 Solve Two-Step Equations Solve 6 + 5y = 26. Check your solution. 6 + 5y = 26Write the equation. 5y= 20Simplify. y= 4Simplify. –6 = –6Subtract 6 from each side. Divide each side by 5. Answer: The solution is 4.
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Example 2 Solve Two-Step Equations Check 6 + 5y = 26Write the original equation. ? 6 + 5(4) = 26Replace y with 4. 26 = 26 6 + 20 = 26Simplify. ?
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1.A 2.B 3.C 4.D Example 2 A.4 B.5 C.6 D.7 Solve 4 + 2w = 18. Check your solution.
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Example 3 Solve Two-Step Equations Solve –3c + 9 = 3. Check your solution. –3c + 9 = 3Write the equation. –3c= –6Simplify. c= 2Simplify. –9 = –9Subtract 9 from each side. Divide each side by –3. Answer: The solution is 2.
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Example 3 Solve Two-Step Equations Check –3c + 9 = 3Write the original equation. ? –3(2) + 9 = 3Replace c with 2. 3 = 3 –6 + 9 = 3Simplify. ?
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1.A 2.B 3.C 4.D Example 3 A.–3 B.–1 C.3 D.7 Solve –8k + 7 = 31. Check your solution.
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REVIEW: 1.3x + 1 = 7, x = 3. -6r + 1 = -17, r = 2. 4h – 6 = 22, h = 4. -3y – 5 = 10, y = -1 = -1 3x = 6 3 x = 2 + 6 = + 6 4h = 28 4 4 h = 7 -1 = -1 -6r = -18 -6 r = 3 +5 = + 5 -3y = 15 -3 - 3 y = -5
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End of the Lesson
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Resources Five-Minute Check (over Lesson 3–4) Image Bank Math Tools Solving Equations Using Models Perimeter Solving EquationsTwo-Step Equations
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