Question

Zad1

A) 4(x-2)-2(x-4)=5(x+1)-3x

B) 2(x-4)=2(2x-1)+6(x+1)

Zad2

/ to znaczy ulamek

A)1/2y+3=7

B)3/5y+2/5=4

C)3(y+2)=5

D)7(y+3)=5y+2+2y

E)y/2+1/3=7/6

F)y+3/2-(1-y)=3,5

G)1/5(y-3)-2/3(y-3/5)+1/3=2/5-1/3(2y-3)

H)2y+4/4=1/2y+1

i)y-2/3+1/15-2y-5/3=8-4y/5

J)y-5/2+2y+3/5+1/3=y+7/15+y/2

To na jutro daje naj

Answer 1

A) 4(x-2)-2(x-4)=5(x+1)-3x

4x-8-2x+8=5x+5-3x

2x=2x+5

2x-2x=5

0x=5

B) 2(x-4)=2(2x-1)+6(x+1)

2x-8=4x-2+6x+6

2x-8=10x+4

2x-10x=4+8

-8x=12/(-8)

x=-12/8

x=-0.125

Zad2

A)1/2y+3=7

0.5y=7-3

0.5y=4/0.5

y=8

B)3/5y+2/5=4

3/5y=4-2/5

0.6y=4-0.4

0.6y=3.6/0.6

y=6

C)3(y+2)=5

3y+6=5

3y=5-6

3y=-1/3

y=-1/3

D)7(y+3)=5y+2+2y

7y+21=7y+2

7y-7y=2-21

0y=-19

E)y/2+1/3=7/6*2

2y/2+2/3=14/6

y=14/6-2/3

y=14/6-4/6

y=10/6

y=1 4/6=1 2/3

 

F)y+3/2-(1-y)=3,5

y+1.5-1+y=3.5

2y=3.5-1.5

2y=2/2

y=1

G)1/5(y-3)-2/3(y-3/5)+1/3=2/5-1/3(2y-3)

1/5y-3/5-2/3y+6/15+1/3=2/5-2/3y+3/3

1/5y-2/3y+2/3y=2/5+1+3/5-6/15-1/3

1/5y=1+2/5+3/5-6/15-1/3

1/5y=1+5/5-6/15-5/15

1/5y=1+1-11/15

1/5y=2-11/15

1/5y=1 4/15:1/5

y=19/15:1/5

y=19/15*5/1

y=95/15

y=6 5/15

y=6 1/5

H)2y+4/4=1/2y+1

2y-1/2y=-4/4+1

1,5y=-1+1

1.5y=0/1.5

y=0

 

 

 

 

 

 

 

Answer 2

1.

A)

4(x-2)-2(x-4)=5(x+1)-3x

4x-8-2x+8=5x+5-3x

2x=2x+5

2x-2x=5

0=5 rów.sprzeczne

B)

2(x-4)=2(2x-1)+6(x+1)

2x-8=4x-2+6x+6

2x-8=10x+4

2x-10x=4+8

-8x=12/:(-8)

x=-1,5

 

2.

A)

1/2y+3=7

0,5y=7-3

0,5y=4/:0,5

y=8

B)

3/5y+2/5=4

3/5y=4-2/5

3/5y=3 3/5

3/5y=18/5 /*5/3

y=6

C)

3(y+2)=5

3y+6=5

3y=5-6

3y=-1/:3

y=-1/3

D)

7(y+3)=5y+2+2y

7y+21=7y+2

7y-7y=2-21

0=19 rów. sprzeczne

E)

y/2+1/3=7/6

1/2y=7/6-1/3

1/2y=7/6-2/6

1/2y=5/6 /*2

y=10/6

y=1 2/3

F)

y+3/2-(1-y)=3,5

y+1,5-1+y=3,5

2y=3,5-0,5

2y=3/:2

y=1,5

G)

1/5(y-3)-2/3(y-3/5)+1/3=2/5-1/3(2y-3)

1/5y-3/5-2/3y+2/5+1/3=2/5-2/3y+1

1/5y-2/3y-1/5+1/3=2/5-2/3y+1  /*15

3y-10y-3+5=6-10y+15

-7y+2=-10y+21

-7y+10y=21-2

3y=19/:3

y=6 1/3

H)

2y+4/4=1/2y+1

2y-1/2y=1-1

1,5y=0/:1,5

y=0

i)

y-2/3+1/15-2y-5/3=8-4y/5  /*15

15y-10+1-30y-25=120-12y

-15y-34=120-12y

-15y+12y=120+34

-3y=154/:(-3)

y=-51 1/3

J)

y-5/2+2y+3/5+1/3=y+7/15+y/2  /*30

30y-75+60y+18+10=30y+14+15y

90y-47=45y+14

90y-45y=14+47

45y=61/:45

y=1 16/45