Question

во вложений!!!!!!!!!!!!!!!!

Answer 1

$left { {{frac{2x-3y}{3}-frac{x-2y}{2}=frac{3}{2}} atop {frac{2x+y}{2}-frac{x+2y}{3}=frac{1}{3}}} right.\ left { {{frac{4x-6y}{6}-frac{3x-6y}{6}=frac{3}{2}} atop {frac{6x+3y}{6}-frac{2x+4y}{6}=frac{1}{3}}} right.\ left { {{frac{x}{6}=frac{3}{2}} atop {frac{4x-y}{6}=frac{1}{3}}} right.\ left { {{x=9}} atop {4x-y=2}} right.\ left { {{x=9}} atop {y=4*9-2}} right.\ left { {{x=9}} atop {y=34}} right.$

Ответ: 9;34

 

 

$left { {{2x+5y=1} atop {4x+3y=9}} right.\ left { {{2x+5y=1 [*(-2)]} atop {4x+3y=9}} right.\ left { {{-4x-10y=-2} atop {4x+3y=9}} right.\ left { {{-7y=7} atop {4x+3y=9}} right.\ left { {{y=-1} atop {x=frac{9-3y}{4}}} right.\ left { {{y=-1} atop {x=frac{9-3*(-1)}{4}=3}} right.$

Ответ: 3;-1