Question

Решить систему управлений.
{х+2у=1/12
{2х-у=-1/4​

Answer 1

$begin{cases}x+2y=frac1{12}\2x-y=-frac14end{cases}Rightarrowbegin{cases}x=frac1{12}-2y\2cdotleft(frac1{12}-2yright)-y=-frac14end{cases}\\2cdotleft(frac1{12}-2yright)-y=-frac14\frac16-4y-y=-frac14\5y=frac16+frac14\5y=frac5{12}\y=frac1{12}\\begin{cases}x=-frac1{12}\y=frac1{12}end{caseS}$

Answer 2

..................................