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-9x + 4y
9x - 4y
3x - 2y
2x + 5y


2)19
12
10
15


3)5
4
6
3


9x 4y 9x 4y 3x 2y 2x 5y 219 12 10 15 35 4 6 3 class=
9x 4y 9x 4y 3x 2y 2x 5y 219 12 10 15 35 4 6 3 class=
9x 4y 9x 4y 3x 2y 2x 5y 219 12 10 15 35 4 6 3 class=