coolneel 11.y-2x=6
y=6+2x
x=0
y=6
x=-3
y=0
d)
12.y=kx+7
k=-(7-y):x
k=-(7-5):2=-1
b)
16.y-тарелка
x-стакан
y+4x=13
2y+x=12
y=13-4x
y=(12-x):2
13-4x=(12-x):2
26-8x=12-x
14=7x
x=2
18.275^2-2*275*265_265^2=(275-265)^2=100