Solve each by elimination

1. 6x - 4y = 0

-12 + 8y = 0

2. 12x + 10y = 16

-6x - 5y = - 8

3. 6x - 8y = - 14

3x + 12y = 18

4. 4x - 5y = 4

-9x + 12y = 18

5. 3x - 5y = 1

4x - 2y = - 8

6. 20x - 25y = 10

12x - 15y = 9

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