Question

Решите:$\left \{ {{ \frac{5x}{2}+ \frac{y}{5}+4=0} \atop { \frac{x}{3}+ \frac{y}{6}= \frac{1}{6}}} \right.$

Answer 1

$\left \{ {{ \frac{5x}{2} + \frac{y}{5} +4=0} \atop { \frac{x}{3} + \frac{y}{6}= \frac{1}{6} }} \right. \left \{ {{25x+2y+40=0} \atop {2x+y=1|*(-2)}} \right. \left \{ {{25x+2y=-40} \atop {-4x-2y=-2}} \right. \left \{ {{21x=-42} \atop {2x+y=1}} \right. \left \{ {{x=(-42):21} \atop {2x+y=1}} \right.$

$\left \{ {{x=-2} \atop {2*(-2)+y=1}} \right. \left \{ {{x=-2} \atop {-4+y=1}} \right. \left \{ {{x=-2} \atop {y=1+4}} \right. \left \{ {{x=-2} \atop {y=5}} \right.$