x-2y= -4
7x-10y=7
x=-4+2y
7(-4+2y)-10y=7
x= 2y-4
-28+14y-10y=7
x=2y-4
4y=35
y=8,75
x= 13,5
(13,5; 8,75)
x-2y= -4
7x-10y=7
x=-4+2y
7(-4+2y)-10y=7
x= 2y-4
-28+14y-10y=7
x=2y-4
4y=35
y=8,75
x= 13,5
(13,5; 8,75)