7.2 Solving Multi Step Equations

Chapter 7: Section 2: Solving Multi-Step Equations January 6 th , 2009

Warm Up: Review, Solve. ,[object Object],[object Object],[object Object],[object Object]

Things to Remember for Solving Multi-Step Equations! ,[object Object],[object Object],[object Object],[object Object]

Word Problem ,[object Object],Jake + Suki together have 14 Let m = number of models Jake has. Then, 2m – 4 = the number Suki has. m + (2m – 4) = 14 m + (2m – 4) = 14 3m – 4 = 14 3m – 4 + 4 = 14 + 4 3m / 3 = 18 / 3 m = 6

Word Problem m + (2m – 4) = 14 3m – 4 = 14 3m – 4 + 4 = 14 + 4 3m / 3 = 18 / 3 m = 6 Combine Like Terms Addition Prop. of Equality Division Prop. of Equality Solution. Let m = number of models Jake has. Then, 2m – 4 = the number Suki has. 6 = Jake’s Planes 2(6) – 4 = Suki’s Planes 8 = Suki’s Planes

Try This One ,[object Object],p + p – 13 = 171 2p – 13 = 171 EQUATION Combine Like Terms 2p – 13 + 13 = 171 + 13 Add. Prop. of Equ. p = 92 Div. Prop. of Equ. 2p / 2 = 184 / 2 Solution, 92 points scored

Dealing with Consecutive Numbers: 1, 2, 3, 4, 5, 6, 7… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Number Sense ,[object Object],Three Consecutive Numbers is 96 N = the least integer N + 1 = the second integer N + 2 = the third integer N + N + 1 + N + 2 = 96 3N + 3 = 96 N = 31 , N + 1 = 32 , N + 2 = 33 31 + 32 + 33 = 96

Number Sense: Try These ,[object Object],[object Object],88, 89, 90, and 91 32, and 34

Using the Distributive Property ,[object Object],[object Object],2(5x – 3) = 14 10x – 6 = 14 10x – 6 + 6 = 14 + 6 10x = 20 10 10 x = 2  Equation  Distribute  Add. Prop. of Equ.  Div. Prop. of Equ.  Solution

Distributive Property ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Try These: Some times you get Fractions or Decimals. ,[object Object],[object Object]

Assignment #53 ,[object Object]

7.2 Solving Multi Step Equations

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7.2 Solving Multi Step Equations