Question

1.Rozwiąż równania.

a)2(x-1/2)-x+3=3

b)0=3-(2x+1)

c)0=(x-1)-(3x-5)

d)(-1/2x+1)+3x/2=3

e)3(1-x)-(1-2x=9

f)0,5(2-4x)=3-x

1/2-jedna druga

3x/2-3x przez 2

Answer 1

a) 2(x-1/2)-x+3=3

2x-1-x+3=3

x+2+=3

x=3-2

x=1

 

b)0=3-(2x+1)

0=3-2x-1

2x=3-1

2x=2/2

x=1

 

c)0=(x-1)-(3x-5)

0=x-1-3x+5

0=-2x+4

2x=4/2

x=2

 

d)(-1/2x+1)+3x/2=3

-1/2x+1+3x/2=3

-1/2x+3x/2=3-1

-1/2x+3x/2=2/2

-x+3x=1

2x=1/2

x=0,25

 

e)3(1-x)-(1-2x)=9

3-3x-1+2x=9

-x+2=9

-x=9-2

-x=7/(-1)

x=-7

 

f)0,5(2-4x)=3-x

1-2x=3-x

-2x+x=3-1

-x=2/(-1)

x=-2

Answer 2

a)2(x-1/2)-x+3=3

2x-1-x+3=3

2x-x=3+1-3

x=1

 

b)0=3-(2x+1)

0=3+2x-1

-2x=3-1-0

-2x=2

x= -1

 

c)0=(x-1)-(3x-5)

0=x-1-3x+5

-x+3x=-1+5

2x=4

x=2

 

d)(-1/2x+1)+3x/2=3

-1/2x+1+1,5x=3

-1/2x+1,5x=3-1

x=2

 

e)3(1-x)-(1-2x=9

3-3x-1+2x=9

-3x+2x=9-3+1

-x=7

x=-7

 

 

f)0,5(2-4x)=3-x

1-2x=3-x

-2x+x=3-1

x=-2