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A=(-3,1)
f(x)=-3x+7
g(x)=-3x+b
1=9+b
b=-8
g(x)=-3x-8
Zad.2.
P=(4,-1)
f(x)= 0,2x+7
g(x)=-5x+b
-1=-20+b
b=19
g(x)=-5x+19
Zad.3.
y= x-5 /*2
y=-2x+1
2y=2x-10
y=-2x+1
3y=-9
y=-3
2x=2y+10
2x=-6+10=4
x=2
x=2, y=-3
(2,-3)
Zad.4.
y= 2mx-m+3
P=(1,2)
2=2m-1+3
2m=0
m=0
Zad.5.
y=|m-2|x-5
y=-0,2x+3
|m-2|=5
m=7 lub m=-3