1) 7х=5 x=5/7
y=x-3 y=-2целых 2/7
2) х=7+y x=7+y x=-10
5(7+y)-3y=1 2y=-34 y=-17
3) 6x+5y=6 6x+5(-2-2x)=6 x=-4
y=-2-2x y=-2-2x y=6
1) 7х=5 x=5/7
y=x-3 y=-2целых 2/7
2) х=7+y x=7+y x=-10
5(7+y)-3y=1 2y=-34 y=-17
3) 6x+5y=6 6x+5(-2-2x)=6 x=-4
y=-2-2x y=-2-2x y=6