Question

Rozwiarz rownania

A) -2x + 4 = 5x +25

B) 7y - 8 = -y +24

C) -8z + 5 = -z - 1

E) 6 - 5x = 2x - 7

F) -5 + 1 = 8 - 6t

G) 3(x - 1) :2x

H) 5(z - 2) = 7(1 - z)

Answer 1

a) -2x + 4 = 5x +25

-2x-5x=25-4

-7x=21

x=-3

 B) 7y - 8 = -y +24

7y+y=24+8

8y=32

y=4

C) -8z + 5 = -z - 1

-8z+z=-1-5

-7z=-6

z=6/7

E) 6 - 5x = 2x - 7

-5x-2x=-7-6

-7x=-13

x=13/7=1i6/7

F) -5 + 1 = 8 - 6t

6t=8+4

6t=12

t=2

G) 3(x - 1) :2x

3x-3=2x

x=3

H) 5(z - 2) = 7(1 - z)

5z-10=7-7z

12z=17

z=17/12=1i5/12

Answer 2

A) -2x + 4 = 5x +25

-2x - 5x = 25 - 4

-7x = 21 /:(-7)

x = -3

 

B) 7y - 8 = -y +24

7y + y = 24 + 8

8y = 32 /:8

y = 4

 

C) -8z + 5 = -z - 1

-8z + z = -1 - 5

-7z = - 6 /:(-7)

z = 6/7

 

E) 6 - 5x = 2x - 7

-5x - 2x = -7 - 6

-7x = -13 /:(-7)

x = 13/7

x = 1 6/7

 

F) -5 + 1 = 8 - 6t

6t = 8 + 5 - 1

6t = 12 /:6

t = 2

 

G) 3(x - 1) :2x

 

H) 5(z - 2) = 7(1 - z)

5z - 10 = 7 - 7z

5z + 7z = 7 + 10

12z = 17 /:12

z = 17/12

z = 1 5/12