addition method
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Solve each system by addition.
See Examples 1â?"3.
See the Strategy for the Addition Method box
8. x + y = 7
x - y = 9
12. x - 2y = - 1
- x + 5y = 4
16. 3x + 5y = - 11
x - 2y = 11
22. 2x = 2 â?" y
3x + y = - 1
Solve each system by the addition method. Determine whether the equations are independent, dependent, or inconsistent. See Example 4.
26. x - y = 3
- 6x + 6y = 17
Solve each system by the addition method. See Examples 5 and 6.
36. 3/7x + 5/9y = 27
1/9x + 2/7y = 7
44. 3x - 2.5y = 7.125
2.5x - 3y = 7.3125
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Solution Summary
The addition method is typified.
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