Question

6x – 4y = 5,
8x – 8y = 2
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Answer 1

$\displaystyle\bf\\\left \{ {{6x - 4y = 5 \: \: | \times( - 2) } \atop {8x - 8y = 2 }} \right. \\ \displaystyle\bf\\ + \left \{ {{ - 12x + 8y = - 10} \atop {8x - 8y = 2 }} \right. \\ \\ 8 x- 12x = 2 - 10 \\ - 4x = - 8 \\ 4x = 8 \\ x = 8 \div 4 \\ x = 2 \\ \\ 6 \times 2 - 4y = 5 \\ 12 - 4y = 5 \\ 4y = 12 - 5 \\ 4y = 7 \\ y = 7 \div4 \\ y = 1.75$

Ответ: ( 2 ; 1,75 )