Question

Ребят, решите, пожалуйста
75 баллов​

Answer 1

.

$5y + 8(x - 3y) = 7x - 12$

$5y + 8x - 24y = 7x - 12 \\ (5y - 24y) + (8x - 7x) = - 12 \\ - 19y + 1x = - 12$

.

$9x + 3(x - 9y) = 11y + 46$

$9x + 3x - 27y = 11y + 46 \\ (9x + 3x) + ( - 27y - 11y) = 46 \\ 12x - 38y = 46$

Answer 2

$5y + 8(x - 3y) = 7x - 12 \\ 9x + 3(x - 9y) = 11y + 46 \\ \\5y + 8x - 24y = 7x - 12 \\ 9x + 3x - 27y = 11y + 46 \\ \\ x - 19y = - 12 \\ 12x - 38y = 46 \\ \\ - 2x + 38y = 24 \\ 12x - 38y = 46 \\ \\ 10x = 70 \\ x = 7 \\ \\ - 19y = - 12-x \\ - 19y=-19 \\ y=1$

Ответ: (7;1)