Question

Rozwiąż równanie.

a) 2x+4=9
b) -3x+6=7
c) x-6=5x-2
d) 2x=1/3=1 2/3-2x
dam naj!

Answer 1

A) 2x+4 = 9        / -4
    2x= 5             / :2
    x = 5/2 = 2,5 
b) -3x + 6 = 7      / -6
    -3x=1              / :-3
      x = - 1/3
c) x-6 = 5x-2        / +6
    x = 5x-2 +6
    x = 5x+4        / - 5x
    -4x = 4          / : -4
     x = -1
d) 2x+1/3 = 1 2/3 - 2x
   2x - 1 1/3 = -2x
   4x - 1 1/3 = 0
   4x = 1 1/3
   x = 4/3 :4
   x = 4/3 * 1/4 
x = 4/12
x = 1/3

Answer 2

A )
2x + 4 = 9
2x = 9 - 4
2x = 5 / : 2
x = 5/2 = 2 1/2
B )
- 3x + 6 = 7
- 3x = 7 - 6
- 3x = 1 / : ( - 3 )
x = - 1/3
C )
x - 6 = 5x- 2
x = 5x - 2 + 6
x = 5x + 4
- 4x = 4 / : ( - 4 )
x = - 1
D )
2x + 1/3 = 1 2/3 - 2x
2x + 2x = 1 2/3 - 1/3
4x = 4/3 / : 4
x = 1/3