(3y-2x)/3+(4x-y)/2=(x+1)/6
(5x+y)/5-(y-2x)/3=-2/45
решение:
((3y-2x)/3)*2+((4x-y)/2)*3=(x+1)/6
(6y-4x)/6+(12x-3y)/6=(x+1)/6
6y-4x+12x-3y=x+1
12x-4x+6y-3y=x+1
8x+3y=x+1
8x-x+3y=1
7x+3y=1
3y=1-7x
y=(1-7x)/3
y=1/3-7/3x
((5x+y)/5)*9-((y-2x)/3)*15=-2/45
(45x+9y)/45-(15y-30x)/45=-2,/45
45x+9y-15y+30x=-2
45x+30x+9y-15y=-2
75x-6y=-2
75x-6*(1/3-7/3x)=-2
75x-2+14x=-2
75x+14x=-2+2
89x=0
x=0/89
x=0
y=1/3-7/3*0
y=1/3