Question

(4y + 6) = 3 5x + 2 = 3x + 8 2(3x + 2) - 5x = 8 3(x - 2) = 9 (6z + 8) = 4 x + 7 = 18 – 4x – 5y = 20 4 (x – 3) = 8 – 4x 3x + 8 = 15 + 4(2x-3) -8x = -3x + 5 5 x +2 = 3 x – 4 5x + 4 = x + 15

Answer 1

(4y + 6) = 3

4y+6=3

4y=3-6

4y= -3 :4

y= -0,75

 

5x + 2 = 3x + 8

5x-3x=8-2

2x=6 :2

x=3

 

2(3x + 2) - 5x = 8

6x+4-5x=8

6x-5x=8-4

x=4

 

3(x - 2) = 9

3x-6=9

3x=9-6

3x=3 :3

x=1

 

(6z + 8) = 4

6z+8=4

6z=4-8

6z= -4 :6

z= -1,5

 

x + 7 = 18-4x

x+4x=18-7

5x=11 :5

x=2,2

 

 

–5y = 20 : -5

y= -4

 

 

4 (x – 3) = 8-4x

4x-12=8-4x

4x+4x=8+12

8x=20 :8

x=2,5

 

3x + 8 = 15 + 4(2x-3)

3x+8=15+8x-12

3x-8x=15-12-8

5x=-5 :5

x= -1

 

 

-8x = -3x + 5

-8x+3x=5

-5x=5 : -5

x= -1

 

5 x +2 = 3 x – 4

5x-3x=-4-2

2x=-6 :2

x= -3

 

 

5x + 4 = x + 15       

5x-x=15-4

4x=11 :4

x=2,75

 

 

 

Proszę:)