Question

Dau 20 de puncte multumesc anticipat celor care ma ajuta.

Answer 1

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Answer 2

5)

a)|x-2|=5

x-2=5

-(x-2)=5

x=5+2=7

-x+2=5

2-x=5

-x=5-2=3

x=-3

S={7,-3}

b)2x-1=3

2x=3+1=4

$x = \frac{4}{2} = 2$

c)1-2x≤3

-2x≤3-1

-2x≤2

x≥-1

d)[x+1]=2

x+1=2

x=2-1=1