Question

Prosze rozwiozcie mi jeszcze dziś takie zadanie 7x-2=3x+6 5x+3=2x+12 5x-2=4x+5 7x+3=4x-12 2(x+3)=10 3(x-1)+2=8 4(x-2)-x=x+1 dam 50 pkt z gury dziekuje

Answer 1

a) 7x-2=3x+6

7x - 3x = 6 + 2

4x = 8 | /4

x = 2

b)  5x+3=2x+12

5x - 2x = 12 - 3

3x = 9 | /3

x = 3

c) 5x-2=4x+5

5x - 4x = 5 + 2

x = 7

d)  7x+3=4x-12

7x - 4x = -12 - 3

3x = -9 |/3

x = -3

e)  2(x+3)=10

2x + 6 = 10

2x = 10 - 6

2x = 4 | : 2

x = 2

f)  3(x-1)+2=8

3x - 3 + 2 = 8

3x = 8 + 3 - 2

3x = 9 | /3

x = 3

g)  4(x-2)-x=x+1

4x - 8 - x = x + 1

3x - x = 1 + 9

2x = 10 | /2

x = 5

Answer 2

1 )

 

7x-2=3x+6 / +2

7x = 3x+8 / -3x

4x = 8 / :4

x =2

 

2)

 

5x+3=2x + 12

3x-3=12

3x=9 / :3

x=3

 

3)

 

5x-2=4x+5

x-2 =5

x=7

 

4)

 

7x+3=4x-12

3x+3=-12

3x=-9 / :3

x=-3

 

5)

 

2(x+3)=10

2x + 6 = 10

2x=4 /:2

x=2

 

6)

 

3(x-1)+2=8

3x-3 + 2 = 8

3x-1=8

3x=9 /:3

x=3

 

7)

 

4(x-2)-x=x+1

4x - 8 - x = x + 1

3x - x = 1 + 9

2x = 10 | /2

x = 5