Question

oblicz A] 3x + 2 = 20 b) -2z +4=14 c) -x+7=5x+1 d) 6y + 30 = -2y - 2 e) 4z+35= -z+5 f)12x-10= -6x + 8 g) 2x-2=4x - 2 h -2z-12=-3z=13 Prosze o szybka odp

Answer 1

1.

3x+2=20 -6;

3x=-2+14

3x=12/3

x=4

 

2.

-2z+4=14 -5

-2z=9-4

-2z=5/(-2)

z=-2 1/2

 

3.

-x+7=5x+1

-x-5x=-7+1

-6x=-6/(-6)

x=1

 

4.

6y+30= -2y-2

6y+2y=-30-2

8y=-32/8

y=-4

 

5.

4z+35= z+5

4z-z=5-35

3z=30/3

z=10

 

6.

12x-10= -6x+8

12x+6x=8+10

18x=18/18

x=1

 

7.

2x-2=4x-2 -1

2x-4x=-3+2

-2x=-1/(-2)

x=1/2

 

8.

-2z-12= -3z-13

-2z+3z=-13+12

z=-1

 

Liczę na naj :)