Question

siemkamoze ktos rozwiazac to zadanie 2x+1=7-x 18-7y=2y-57 6,8z+6=z+24 a-4=2/3a-8 6 4/5=1/7b-1/5

Answer 1

2x +1 = 7-x

2x +x = 7 -1

3x = 6 /:3

    x = 2

 

18 -7y = 2y -57

-7y -2y = -57 -18

 - 9y = - 75 / :(-9)

      y = 8 i 3/9

      y = 8i1/3

 

6,8z +6 = z +24 /*10

68z +60 = 10z +240

68z - 10z = 240 -60

58z = 180 /:58

   z = 180/58

   z = 3i6/58

   z = 3i3/29

 

a-4 = 2/3 a -8  /*3

3a -12 = 2a -24

3a -2a = -24 +12

   a = -12

 

6i4/5 = 1/7b -1/5

-1/7b = -1/5 -6i4/5

-1/7b = -7 /:(-1/7)

  b = 7 *7/1

  b = 49