Question

Rozwiąż równania : zad1 strona 199
x+75= 57
1 1/3 + y = 2 3/4
t-34=-35
3x = 2x+ 1/7
3-x= -2x
5y = 13
1/7x= -2
-7b= 7/8
7a + 7 = 35
2 - x = 5 - 2x
69- x = x + 96
1/2c + 5 = c + 8
jak zapisać to do zeszytu ? prosze pomóżcie potrzebuje na jutro

Answer 1

x+75= 57

x = 57-75

x= - 18

1 1/3 + y = 2 3/4

y= 2 3/4 - 1 1/3

y=  2 9/12 - 1 4/12

y = 1 5/12

t-34=-35

t = -35 +34

t= -1

3x = 2x+ 1/7

3x-2x=1/7

x=1/7

3-x= -2x

-x+2x =-3

x=-3

5y = 13 /:5

y= 2 3/5

1/7x= -2 / : 1/7  

x = - 14

-7b= 7/8 /: -7

b = -1/8

7a + 7 = 35

7a= 35-7 /:7

a= 28/7

a= 4

2 - x = 5 - 2x

-x+2x=5-2

x=3

69- x = x + 96

-x-x=96-69

-2x=27 / : (-2)

x = - 13 1/2

1/2c + 5 = c + 8

1/2c-c=8-5

-1/2 c=3 /: (-1/2)

c = -6

Answer 2

x+75 = 57

x= 57 - 75

x = - 18

 

1 i1/3 +y = 2i3/4

4/3 + y = 11/4      /*12

16 + 12y = 33

12y = 33 -16

12y = 17 /:12

   y = 17/12

 

t - 34 = -35

t = -35 + 34

t = -1

 

3x = 2x +1/7

3x -2x = 1/7

  x = 1/7

 

3 -x = -2x

-x + 2x = -3

  x = -3

 

5y = 13   /:5

y = 13/5

 

1/7x = -2 /:1/7

   x = -2 *7/1

   x = -14 

 

-7b = 7/8

b = 7/8 : (-7)

b = 7/8 * (-1/7)

b = 1/8 * (-1/1)

b = - 1/8

 

7a +7 = 35

7a = 35 - 7

7a = 28 /:7

a = 4

 

2 -x = 5 - 2x

-x +2x = 5 -2

   x = 3

 

69 - x = x +96

  -x -x = 96 - 69

    -2x = 27 /:(-2)

     x = - 13 i1/2

 

1/2c +5 = c +8

1/2c -c = 8 -5

-1/2c = 3  /:(-1/2)

  c = 3 *(-2/1)

  c = -6