{2x+5y=10. 5x3-y=12  - Y=26/-31 y=26/31, {-6x-4y=24. -6x+6y=-36 - Y=39/26. , {2x+4y=10. 5x-3y=2 - {-7+8y=-15. 7-15y=8. -15=y=8,

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