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Solving Equations (review)

Solving Equations (review). 8 th Grade: Pre-Algebra. Check HW. Vocabulary. Equation Solve Solution Inverse Operation Isolate the Variable Addition Property of Equality Subtraction Property of Equality Division Property of Equality Multiplication Property of Equality.

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Solving Equations (review)

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  1. Solving Equations (review) 8th Grade: Pre-Algebra

  2. Check HW

  3. Vocabulary • Equation • Solve • Solution • Inverse Operation • Isolate the Variable • Addition Property of Equality • Subtraction Property of Equality • Division Property of Equality • Multiplication Property of Equality

  4. Properties of Addition & Multiplication Associative Property of Addition: (a + b) + c = a + (b + c) Associative Property of Multiplication: (a x b) x c = a x (b x c) Commutative Property of Addition: a + b = b + a Commutative Property of Multiplication: a x b = b x a

  5. More Properties Distributive Property: a x (b + c) = (a x b) + (a x c) Identity Property of Addition: 0 + a = a Identity Property of Multiplication: 1 x a = a Inverse Property of Addition: a + (-a) = 0 Inverse Property of Multiplication: a x 1/a = a/a = 1 when a ≠ 0

  6. Solving one-step equations • n + 9 = 27 • 12 + y = 55 • 67 = 51 + x • h – 12 = 18 • r – 11 = 28 • c – 7 = 21 • 5 + x = 23

  7. Solving more one-step equations • 2x = 14 • w/5 = 11 • 3h = 45 • x/4 = 36 • x/3 = 9 • 6d = 66 • r/4 = 7 • 7d = 12

  8. Remember Integer Rules  • 2z = -6 B. • -6k = 54 • -8d = -12 • -p = -34 • -w = 17 • -t = 62 • -y = -16

  9. Review solving one-step equations • 5y = -25 8. z – 15 = -19 • x + 4 = 24 9. -13d = 4 • d – 11 = 14 • -t = 2 10. 5. 6. -14b = 12 7.

  10. Solving Two-Step Equations • 6x – 4 = -34 • 5y – 3 = 32 • 8 – t = 1 • 10p – 6 = -36 • 11 – 9m = -70 • 4x – 12 = 24

  11. Homework Practice Pre-Algebra Textbook: Page 16 (21-35) Page 21 (29-36)

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