Question

Срочно пример по алгебре
$\left \{ {{3x+2y=8} \atop {4x-y=7}} \right.$

Answer 1

$\left \{ {{3x+2y=8} \atop {4x-y=7}} \right.$

$\left \{ {{3x+2y=8} \atop {y = - 7 + 4x}} \right.$

$3x + 2( - 7 + 4x) = 8$

Представить данное

$3x - 14 + 8x = 8$

$11x - 14 = 8$

$11x = 8 + 14$

$11x = 22$

$x = 2$

Представить данное

$y = - 7 + 4 \cdot 2$

$y = - 7 + 8$

$y = 1$

$\underline{(x,y)}$

$(x,y) = (2,1)$

Ответ:

$\blue{(x,y) = (2,1)}$