Question

{4x-3y=15
{3x-4y=6

Помогите Математика

Answer 1

Ответ:

(х,у)=(6,3)

Пошаговое объяснение:

вот........

Answer 2

$\displaystyle\left \{ {{4x-3y=15} \atop {3x-4y=6}} \right. \Leftrightarrow \left \{ {{x=\frac{15+3y}{4}} \atop {\frac{3(15+3y)}{4}-4y=6}} \right. \Leftrightarrow \left \{ {{x=\frac{15+3y}{4}} \atop {\frac{45+9y}{4}-\frac{16y}{4}=6}} \right. \Leftrightarrow \\\\ \left \{ {{x=\frac{15+3y}{4}} \atop {\frac{45-7y}{4}=6}} \right. \Leftrightarrow \left \{ {{x=\frac{15+3y}{4}} \atop {-7y=6*4-45}} \right. \Leftrightarrow$

$\displaystyle\left \{ {{x=\frac{15+3*3}{4} } \atop {y=3}} \right. \Leftrightarrow \displaystyle\left \{ {{x=6} \atop {y=3}} \right. \\\\\\\textbf{(\emph{x,y})=(6,3)}$