Question

Dokończ równania :

a 3x-1=2x+3

b 5x+2=4x-1

c 6x+3=5x-6

d 12x+5=-x+7

e -2+5x=-x+4

Answer 1

a. 3x - 1 = 2x +3

     3x - 2x = 3 +1

             x = 4

 

b. 5x + 2 = 4x - 1

     5x - 4x = -1 - 2

           x = - 3

 

c. 6x + 3 = 5x - 6

    6x - 5x = - 6 - 3

           x = - 9

 

d. 12x + 5 = x + 7

     12x - x = 7 - 5

      11x = 2

          x = ok. 0,18

 

e. -2 + 5x = -x + 4

     5x + x = 4 + 2

          4x = 6 /:4

            x = 1.5

Answer 2

a 3x-1=2x+3/-2x
1x-1=3/+1
1x=4
x=4

b 5x+2=4x-1/+1
5x+3=4x/-3
5x=4x-3/-4x
x=-3

c 6x+3=5x-6/-3
6x=5x-9/-5x
x=-9

 

d 12x+5=-x+7/+x
13x+5=7/-5
13x=2/ :13
x=2/13

e -2+5x=-x+4/+x
-2+4x=4/+2
4x=6/ :4
x=6/4