Question

5) (-5x - 3y = 36,

4x + y = -29;​

Answer 1

$\displaystyle\bf\\\left \{ {{5x-3y=36} \atop {4x+y=-29} \ |\cdot 3} \right. \\\\\\+\left \{ {{5x-3y=36} \atop {12x+3y=-87}} \right.\\-----------\\ 17x=-51\\\\x=-3\\\\y=-4x-29=-4\cdot(-3)-29=12-29=-17\\\\Otvet \ : \ (-3 \ ; \ -17)$