Question

Pomożecpotrzebne na dziś :/
Rozwiąż równania:
1.10x = -5x - 30
2. -10= 2x +4
3. -(4+x) = 2 (3-x)
4. 2t - (-1 - 19t)= 6
5. 4x = -16
6. -3/4x = -4/9
7. -3/5x = 5
8. 2x = 7x + 18
9. 1/3x = -6
10. 15x = -5
11. 3 (y-6) -y = 2(-y+9)
12. 3 (x+1) = -x
13. -3 + 2x = 17

Błagam pomocy! :) jestem kiepska z matmy :/
Dam naj! :)

Answer 1

1. 10x = -5x -30
   10x + 5x = -30
   15x = -30 /:15
   x = -2
2. -10 = 2x + 4
    -2x = 10 + 4
    -2x = 14 / :(-2)
     x = -7
3. -(4+x) = 2 (3-x)
    -4 -x = 6 -2x
    -x + 2x = 6 + 4
    x = 10
4. 2t - (-1 - 19t)= 6
   2t + 1 + 19t = 6
  21t = 5 / :21
  t =5/21
5. 4x = -16 / : 4
    x = -4
6. -3/4x = -4/9 / : -3/4
     x = (-4/9)/(-3/4)
     x = -4/9 * -3/4
    x = 12/36
    x = 1/3
7.-3/5x = 5 / :-3/5
   x = 5/(3/5)
   x= 5/1 * 5/3
   x = 25/3
8. 2x = 7x + 18
   2x -7x = 18
   -5x = 18 / :-5
    x = 18/5
9. 1/3x = -6 / :1/3
    x = -6 * 3
    x = -18
10. 15x= -5 / :15
       x = - 5/15
       x = - 1/3
11. 3 (y-6) -y = 2(-y+9)
      3y -18 -y = -2y + 18     18 i -18 się skrócą
      3y - y + 2y = 0
     4y = 0 
12. 3 (x+1) = -x 
      3x +3 = -x
      4x = 3 / : 4
      x = 3/4
13.-3 + 2x = 17
     2x = 20 /:2
     x = 10