lesson32outline

lesson32outline - MA 153 Lesson 32 Outline Lesson 32...

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MA 153 Lesson 32 Outline Lesson 32 Section 9.2 Systems of Equations Solve a system of equations: (1) By substitution (2) By elimination (today) Given a system of two equations and two unknowns, you can: (1) interchange the equations (2) multiply or divide one equation by a number (both sides) (3) Add the left sides of the equations and add the right sides of the equations Goal of elimination: eliminate one of the two variables Example: Solve: (a) 23 28 xy += −= 2
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(b) 11 5 32 2 1 3 cd += −= (c) 23 5 691 xy −+ = 2
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(d) 52 31 5 6 xy −= Example:
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lesson32outline - MA 153 Lesson 32 Outline Lesson 32...

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