Question

помогите пожалуйста дам 50 баллов ​
срочнооо!!!!!!!!

Answer 1

$\displaystyle\bf\\\left \{ {{ \frac{x + 2y}{5} + \frac{3x - y}{3} = 5 \: \: | \times 15 } \atop {2x - 3y = - 1}} \right. \\\displaystyle\bf\\\left \{ {{3(x +2 y) + 5(3x - y) = 75} \atop {2x - 3y = - 1}} \right. \\ \displaystyle\bf\\\left \{ {{3x + 6y + 15x - 5y = 75} \atop {2x - 3y = - 1}} \right. \\ \displaystyle\bf\\\left \{ {{y + 18x = 75} \atop {2x - 3y = - 1}} \right. \\ \displaystyle\bf\\\left \{ {{y = 75 - 18x} \atop {2x - 3(75 - 18x) = - 1}} \right. \\ \\2x - 225 + 54x = - 1 \\ 56x = - 1 + 225 \\ 56 x= 224 \\ x = 224 \div 56 \\ x = 4 \\ \\ y = 75 - 18 \times 4 \\ y = 75 - 72 \\ y = 3$

Ответ: ( 4 ; 3 )