Question

Rozwiaz rownania:
1. 3x - 1/2 + 3/2 x - 3 1/2 = 5/2 x
2. 2/3 (5-x)=1/5
3.3(x-1)-2(3+x)=4(x-2)
4.4(x-6)-2(x+7)=8(x-8)-1/2(4-2x)
5.7(6-x)-1/3x+1/2(x+2)=3(1/3x-1)
6.4(x-1) + 2(x+6) = 2(2-X)
kreska ulam.
5 kreskA ULAM.
7 KRESKA ulamk.
5

Answer 1

1. 3x - 1/2 + 3/2 x - 3 1/2 = 5/2 x

3 3/2x -2 = 5/2 x / *2

9x -4 =5x /+4

9x =5x +4 /-5x

4x =4

x=1

2. 2/3 (5-x)=1/5 

10/3 - 2/3 x = 1/5 /*3

10 - 2x = 3/5 /*5

50 -10x = 3 / +10x

50 = 3 +10x / -3

47 =10x

x=4,7

3.3(x-1)-2(3+x)=4(x-2)

3x -3 -6 -2x =4x -8

x -9 =4x -8 /+9

x=4x +1 / -4x

-3x=1 / : -3

x= -1/3

4.4(x-6)-2(x+7)=8(x-8)-1/2(4-2x)

4x -24 -2x -14 =8x -64 -2 -x

2x -38 =7x -66 /+66

2x+ 28 =7x /-2x

28=5x/:5

x=5/6

5.7(6-x)-1/3x+1/2(x+2)=3(1/3x-1)

42 -7x - 1/3x +1/2x +1 =x-1

43 - 7 1/6x =x -1 /+1

44 - 7 1/6x =x /+7 1/6x

44 = 8 1/6x 

x= 264/49

x= 5 19/49

6..4(x-1)              + 2(x+6)       =             2(2-X)
kreska ulam.
5                      kreskA ULAM.
                           7                          KRESKA ulamk.
                                                        5

4x-4              + 2x+12       =             4-2x
kreska ulam.
5                      kreskA ULAM.
                           7                          KRESKA ulamk.
                                                        5

 

7(4x-4 )             + 5(2x+12)       =            7 (4-2x)
kreska ulam.
35                      kreskA ULAM.
                        35                        KRESKA ulamk.
                                                       35                          / *35

 

7(4x-4 )+ 5(2x+12) =7 (4-2x)

 28x -28 +10x + 60 = 28 -14x

38x +32 = 28 -14x / -28

38x + 4 = -14x / -4

38x= -14x+ 4 / + 14x

52x=4 /52

x = 1/13

Answer 2

1)

całosc *2

6x-1+3x-7=5x

6x+3x-5x=7+1

4x=8/4

x=2

 

2)10/3-2/3x=1/5  *15

50-10x=3

-10x=-47/-10

x=4.7

 

 

3)

3x-3-6-2x=4x-8

3x-2x-4x=-8+6+3

-3x=1/-3

x=-1/3

 

4)

4x-24-2x-14=8x-64-2+x

-7x=28/-7

x=-4

 

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