Question

Proszę o działania

7w + 12 = 4w - 3

12 k + 6 = 5 k - 7

3 k + 2 = 16 - 8 k

5 l + 7 l = 15 - 2 l

4 m + 4 = 7 m - 12

- 9 s + 12 = 4 s - 26

5 x + 8 = 7 x + 12

5 o + 6 = 4 o - 18

4 k + 2 = 7 k + 46

8 r + 12 = 12 r - 28

Answer 1

7w+12=4w-3

7w-4w= -3 - 12

3w= -15 / :3

w= -5

 

12k +6= 5k-7

12k-5k= -7 -6
7k= -13 /7

k= -13/7

 

3k+2=16-8k

3k-8k=16-2

-5k=14 /-5

k=-14/5

k= 2 i 4/5
 

5l+7l=15-2l

12l+2l=15

14l=15 /14

l= 15/14

l= 1 i 1/14

 

4m+4=7m-12

4m-7m=-12-4

-3m=-16 /-3

m= 16/3

m= 5 i 1/3

 

-9s+12=4s-26

-9s-4s=-26-12

-13s=-38 /-13

s= 38/12

s= 3 i 1/6

 

5x+8=7x+12

5x-7x=12-8

-2x=-4 /-2

x= 2

 

5o+6=4o-18

5o-4o=-18-6

o=-24

 

4k+2=7k+46

4k-7k=46-2

-3k=44 /-3

k= -44/3

k=14 i 2/3

 

8r+12=12r-28

8r-12r=-28-12

-4r=-40 /-4

r=10

 

 

Answer 2

7w+12=4w-3

7w-4w=-3-12

3w=-15 |:3

w=-5

 

12k+6=5k-7

12k-5k=-7-6

7k=-13 |:7

k=-1 6/7

 

3k+2=16-8k

3k+8k=16-2

11k=14 |:11

k=1 3/11

 

5l+7l=15-2l

12l-2l=15

10l=15 |:10

l=1 1/2

 

4m+4=7m-12

4m-7m=-12-4

-3m=-16 |:(-3)

m=5 1/3

 

-9s+12=4s-26

-9s-4s=-26-12

-13s=-38 |:(-13)

s=2 12/13

 

5x+8=7x+12

5x-7x=12-8

-2x=4 |:(-2)

x=-2

 

5o+6=4o-18

5o-4o=-18-6

o=-24

 

4k+2=7k+46

4k-7k=46-2

-3k=44 |:(-3)

k=-14 2/3

 

8r+12=12r-28

8r-12r=-28-12

-4r=-40 |:(-4)

r=10