I need help with 11, 12, and 13

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I need help with 11, 12, and 13

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11] 6x + 9y = 20Multiply both sides by 2.12] 14y - 7x = 0 (can be simplified to 2y - x = 0 by dividing by 7)Multiply both sides by 6.13] 4y - 10x = 6Multiply both sides by 3,Hope this helps

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