Splash Screen. Over Lesson 4–3 5-Minute Check 1 Solve x – 3 = –6. Check your solution. Solve y + 9 = 7. Check your solution. Solve 23 = m – 6. Check your.

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Presentation transcript:

Splash Screen

Over Lesson 4–3 5-Minute Check 1 Solve x – 3 = –6. Check your solution. Solve y + 9 = 7. Check your solution. Solve 23 = m – 6. Check your solution. Lance is 65 inches tall. This is 6 inches taller than Rebecca. Write and solve a subtraction equation to find Rebecca’s height in inches.

Over Lesson 4–3 5-Minute Check 1 A.9 B.3 C.–3 D.–9 Solve x – 3 = –6. Check your solution.

Over Lesson 4–3 5-Minute Check 2 A.2 B.–2 C.–7 D.–16 Solve y + 9 = 7. Check your solution.

Over Lesson 4–3 5-Minute Check 3 A.–29 B.–17 C.17 D.29 Solve 23 = m – 6. Check your solution.

Over Lesson 4–3 5-Minute Check 6 A.r – 6 = x, r – 6 = 65, r = 71 in. B.r = x – 6, r = 65 – 6, r = 59 in. C.r = x + 6, r = , r = 71 in. D.r = 6 – x, r = 6 – 65, r = –59 in. Lance is 65 inches tall. This is 6 inches taller than Rebecca. Write and solve a subtraction equation to find Rebecca’s height in inches.

Then/Now You have already solved equations using addition and subtraction. (Lesson 4–3) Solve equations by using the Division Property of Equality. Solve equations by using the Multiplication Property of Equality.

Concept A

Example 2 Solve Equations by Dividing Write the equation. Solve 7x = –56. Division Property of Equality Identity Property; 1x = x

Example 2 Solve Equations by Dividing To check your solution, replace x with –8 in the original equation. Answer: The solution is –8. The sentence is true. Check Write the equation. Replace x with –8. ?

Example 3 Solve an Equation by Dividing HOBBIES Esteban spent $112 on boxes of baseball cards. He paid $14 per box. Write and solve an equation to find how many boxes of cards Esteban bought..

Example 3 Solve an Equation by Dividing Write the equation. Division Property of Equality Simplify.

Example 3 Solve an Equation by Dividing Check 14b = 112Write the equation. To check your solution, replace b with 8 in the original equation. ? 14(8) =112Replace b with = 112The sentence is true. Answer: Therefore, Esteban bought 8 boxes of cards.

Example 1 A.–132 B.–10 C.10 D.132 Solve 12p = 120.

Example 2 A.–48 B.–3 C.3 D.48 Solve -12 = 4x. Check your solution.

Example 3 A.3d = 27, 9 dozen B.27d = 3, 9 dozen C.9d = 27, 3 dozen D.27d = 9, 3 dozen DOUGHNUTS Eliza spent $27 on doughnuts. She paid $3 per dozen. Write and solve an equation to find how many dozens of doughnuts Eliza bought.

Concept B

Example 4 Solve Equations by Multiplying Write the equation. Solve. Check your solution. Simplify. Multiplication Property of Equality

Example 4 Solve Equations by Multiplying Check Answer: The solution is 60. Write the equation. The sentence is true. Replace y with 60. ?

Example 5 Solve Equations by Multiplying by the Reciprocal Write the equation. Identity Property 1x = 12

Example 5 Solve Equations by Multiplying by the Reciprocal Answer: The solution is 12. Check Write the equation. The sentence is true. Replace x with 12. ?

Example 4 Solve Check your solution. A.–36 B.–5 C. D.36

Example 5 A.–18 B.–8 C.8 D.18

End of the Lesson