Lesson 7­4 Elimination using multiplication with answers.notebook
March 07, 2013
EQ: How do we solve systems of equations with elimination using multiplication?
Questions/Main Ideas Lesson 7­4 Elimination Using Multiplication
­ when you can't add or subtract to eliminate you need to multiply to create opposites
­ if possible, multiply the variable without a coefficient
Examples
1. 2x + y = 23
3x + 2y = 37
Questions/Main Ideas 2.
­5x + 3y = 6
x ­ y = 4
3.
2x + y = 5
3x ­ 2y = 4
Lesson 7­4 Elimination using multiplication with answers.notebook
Questions/Main Ideas ­ sometimes you may have to multiply both equations
Examples
4. 4x + 3y = 8
3x ­ 5y = ­23
Questions/Main Ideas 5.
4x ­ 7y = 10
3x + 2y = ­7
6.
2x ­ 4y = ­22
3x + 3y = 30
March 07, 2013
Lesson 7­4 Elimination using multiplication with answers.notebook
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14­38 even
March 07, 2013