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6/(x-4)=2 /*(x-4) , x≠4
2(x-4)=6
2x-8=6
2x=6+8
2x=14
x=7
5/(x-3)=2/3 /*(3(x-3) , x≠3
2(x-3)=5*3
2x-6=15
2x=15+6
2x=21 /:2
x=10,5
2.
2x+8y-5=0
8y=-2x+5 /:8
y=-1/4 x+5/8
Odp. a=-1/4.
3.
B=(x,y)
1/2*(-3+x)=2
-3+x=4
x=4+3
x=7
1/2*(-2+y)=-5
-2+y=-10
y=-10+2
y=-8
Odp. B=(7, -8)