Question

Rozwiąż równania.
a) 4x - 25 = 7

b) 9z + 4 = 40

c) 3y - 8 = -5

d) 5n + 1 = 16

e) 5x + 9 = 2x + 36

f) 12x + 4 = 7x + 14

g) 7t - 17 = 6t - 16

h) 23s - 45 = 19s - 39

Answer 1

a) 4x=7+25

4x=22

x=5.5

 

b)9z=40-4

9z=36

z=4

 

c)3y=-5+8

3y=3

y=1

 

d)5n=16-1

5n=15

n=3

 

e)5x-2x=36-9

3x=27

x=9

 

f)12x-7x=14-4

5x=10

x=0,5

 

g)7t-6t=-16+17

t=1

 

h)23s-19s=-39+45

4s=6

s=0,66

Answer 2

a) 4x - 25 = 7

4x=7+25

4x=32/:4

x=8



b) 9z + 4 = 40

9z=40-4

9z=36/:9

z=4

c) 3y - 8 = -5

3y=-5+8

3y=3/:3

y=1



d) 5n + 1 = 16

5n=16-1

5n=15/:5

n=3

e) 5x + 9 = 2x + 36

5x-2x=36-9

3x=27/:3

x=9

f) 12x + 4 = 7x + 14

12x-7x=14-4

5x=10/:5

x=2



g) 7t - 17 = 6t - 16

7t-6t=-16+17

t=1



h) 23s - 45 = 19s - 39

23s-19s=-39+45

4s=6/:4

s=6/4

s=3/2

s=1 1/2