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Solving Equations, Combining Like Terms & Perimeter Calculation

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  1. Review Solve the equation • 17 = 5 + x • x - 9 = 15 • 4x = 24 4)

  2. More review Solve the equation 5) X – 15 = - 12 6) -14x = 42 7)

  3. Simplify the following • (-10x)(-6) • 3(-3x) • 2(10 – 6x) • -(-2x + 10y – 6)

  4. Chapter 3 Section 4 Combining Like Terms

  5. Vocabulary Term: • Single number or variable • Product of a number and one or more variables. Example: 5, x, 3xy, 9p

  6. Term Two parts • Number – coefficient • Variable Example: Term: 3x

  7. Fill in the blank Term: Coefficient: Variable:

  8. Like Terms Variables are the same 4x, 3x 2xy, 15xy 4 apples, 3 apples

  9. Combine line terms • 4 bananas + 3 bananas • 6 pears + 7 pears • 3 bananas + 2 pears + 5 bananas + 7 pears

  10. Combine line terms • 4 bananas + 3 bananas • 4 b + 3 b • 6 pears + 7 pears • 6p + 7 p • 3 bananas + 2 pears + 5 bananas + 7 pears • 3b + 2p + 5b + 7p

  11. Try • 2x +3y – 5x + 8y • 2(5 – 3x) + 6x • -(3x + 4) + 2x

  12. Try these d) -16x +7 e)

  13. Simplify before combine • Try: 2(5 – 3x) – 4(x + 3)

  14. Find the perimeter 12 ft 4 feet What is the units for the answer?

  15. Summary • Vocabulary • Terms • Coefficient • Variable • Like terms • Combine like terms • Perimeter of a geometric figure.

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