Question

r) x-3y=4, -x+y=-8 решите систему пж срочно​

Answer 1

$\displaystyle\bf\\ + \left \{ {{x - 3y = 4} \atop { - x + y = - 8 }} \right. \\ \\ - 3y + y = 4 - 8 \\ - 2y = - 4 \\ y = - 4 \div ( - 2) \\ y = 2 \\ \\ x - 3 \times 2 = 4 \\ x - 6 = 4 \\ x = 4 + 6 \\ x = 10$

Ответ: ( 10 ; 2 )