Question

Rozwiąż równania .

8x + 5 = 7x
-x + 25 = 2x - 2

25m - 3 = 24m - 4

17y + 28 = 19y + 27

7n + 2 = 6n - 3

-9z - 7 = -z - 6

-s + 15 = 4s - 14

8k - 19 = -8k + 19

Answer 1

a)8x+5=7x

x=-5

 

b)-x+25=2x-2

-3x=-27

x=9

 

c)25m-3=24m-4

m=-1

 

d)17y+28=19y+27

1=2y

y=0,5

 

e)7n+2=6n-3

n=-5

 

f)-9z-7=-x-6

-8z=1

z=-1/8=-0,125

 

g)-s+19=4s-14

33=5s

s=33/5=5,6

 

h)8k-19=-8k+19

0=0

Answer 2

1.8x+5=7x

8x-7x=-5

x=-5

2.-x+25=2x-2

-x-2x=-2-25

-3x=-27

x=9

3.25m-3=24m-4

25m-24m=-4+3

m=-1

4.17y+28=19y+27

17y-19y=27-28

-2y=-1

y=0,5

5.7n+2=6n-3

7n-6n=-3-2

n=-5

6.-9z-7=-z-6

-9z+z=-6+7

-8z=1

z=-0,125

7.-s+15=4s-14

-s-4s=-14-15

-5s=-29

s=-5,6

8.8k-19=-8k+19

8k+8k=19+19

16k=38

k=2,375