Система y-x=-5 x+y=37

[latex] left { {{y-x=-5} atop {x+y=37}} ight. left { {{y=-5+x} atop {x+(-5+x)=37}} ight. left { {{y=-5+x} atop {x-5+x=37}} ight. left { {{y=-5+x} atop {2x=37+5}} ight. left { {{y=-5+x} atop {2x=42}} ight. left { {{y=-5+x} atop {x=42:2=21}} ight.[/latex][latex] left { {{y=-5+21} atop {x=21}} ight. left { {{y=16} atop {x=21}} ight. [/latex]                             ответ: (21; 16)

y=-5+xx+(-5+x)=372x-5=372x=37+52x=42x=21y=-5+21y=16Ответ:x=21,y=16