Question

{x+y/8 + y/2 = 4
[x/10 - x-y/5 = 1

Answer 1

$\left \{ {{\frac{x+y}{8}+\frac{y}{2}=4\, |\cdot 8} \atop {\frac{x}{10}-\frac{x-y}{5}=1\, |\cdot 10}} \right. \; \left \{ {{x+y+4y=32} \atop {x-2(x-y)=10}} \right. \; \left \{ {{x+5y=32} \atop {-x+2y=10}} \right. \oplus \\\\\left \{ {{7y=42} \atop {x=2y-10}} \right. \; \left \{ {{y=6} \atop {x=2}} \right. \\\\Otvet:\; \; (2,6)\; .$