y=-3/4x + 31/2
x=y
x=-3/4x+31/2
x+3/4x=31/2
7/4x=31/2
x=31/2:7/4=(31*4)/(2*7)=62/7
x=62/7
ответ: (62/7;62/7)
y=-3/4x + 31/2
x=y
x=-3/4x+31/2
x+3/4x=31/2
7/4x=31/2
x=31/2:7/4=(31*4)/(2*7)=62/7
x=62/7
ответ: (62/7;62/7)