Zad.1
ROZWIĄŻ RÓWNANIE
a) | x + 4 | = 14
b) | x - 100 | = 1
c) | x + 7 | = 0,05 d) |10 - x | = 4
e) | x - 1/3 | = 1/2
f) | x + 0,25 | = 3/4
Zad.2
ROZWIĄŻ NIERÓWNOŚĆ
a) | x + 2 | ≤ 3
b) | 8 - x | < 1
c) | 3 - x | ≤ 10/3
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zad.1
a)|x+4|=14
x+4=-14
x=-14-4
x=-18
lub
|x+4=14
x=14-4
x=10
b)
|x-100|=1
x-100=-1
x=-1=100
x=99
lub
|x-100|=1
x-100=1
x=1+100
x=101
c)
|x+7|=0,05
x+7=-0,05
x=-0,05-7
x=-7,05
lub
|x+7|=0,05
x+7=0,05
x=0,05-7
x=-6,95
d) |10-x|=4
10-x=-4
-x=-4-10
-x=-14 /* (-1)
x=14
lub
|10-x|=4
10-x=4
-x=4-10
-x=-6 /* (-1)
x=6
e)|x-1/3|=1/2
x-1/3=-1/2
x=-1/2+1/3
x=-3/6+2/6
x=-1/6
lub
|x-1/3|=1/2
x-1/3=1/2
x=1/2+1/3
x=3/6+2/6
x=5/6
f) |x+0,25|=3/4
x+0,25=-3/4
x=-0,75-0,25
x=-1
lub
|x+0,25|=3/4
x+0,25=3/4
x=0,75-0,25
x=0,5
zadanie 2 w załączniku