Chapter 5 Objective 3.1 Exercises
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Solve by the addition method.
1.
x - y = 3
x + y = 5
2.
2 x - 3 y = 9
4 x - 6 y = 4
3.
2 x + 11 y = -1
3 x + 2 y = 13
4.
2 x - 3 y = -7
3 x + 2 y = -4
5.

6.
x - 2 y - z = -5
5 x - 4 y + z = 5
2 x + 3 y + z = 9
7.
2 x - y + z = -9
3 x + y - 2 z = -7
x + 4 y + 3 z = 16
8.
x + y - z = -2
2 x - y + z = -1
x + 2 y - 3 z = -7
9.
2 x - y - 3 z = -4
x + y + z = 0
x - y - 4 z = -9
10.
3 x + 4 y - 2 z = -1
5 x + 5 y - 3 z = 2
6 x + 3 y - 2 z = 5
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