Question

respknda as equações
12 _2x-1=x-5
13_ 3x - 4 = 2x + 8
14_ 9x+ 1 = 5x - 3
15_ 10 x + 2 = 12 x + 8
16_3x+ 1 = 4x - 3
17_ 2 x + 3 = - 2x - 9
18_ 2(x-1)=x+1
19_3(x-2)=x+1​

Answer 1

Resposta:

12 _2x-1 = x-5

      2x-x = -5+1

           x = -4

13_ 3x-4 = 2x + 8

      3x-2x = 8+4

              x = 12

14_ 9x+1 = 5x - 3

      9x-5x = -3-1

            4x = -4

              x = -4/4

              x = -1

15_ 10x+2 = 12 x + 8

      10x-12x = 8-2

             -2x = 6

                 x = 6/(-2)

                 x = -3

16_3x+1 = 4x - 3

     3x-4x = -3-1

          -1x = -4

             x = -4/(-1)

             x = 4

17_ 2x+3 = - 2x - 9

     2x+2x = -9-3

           4x = -12

              x = -12/4

              x = -3

18_ 2(x-1)=x+1

      2x-2 = x+1

       2x-x = 1+2

             x = 3

19_3(x-2)=x+1

     3x-6 = x+1

     3x-x =1+6

     2x = 7

       x = 7/2

       x = ​3,5

Tamo Junto!@!

Answer 2

12 _2x-1=x-5 --> 2x-x=-5+1 --> x=-4

13_ 3x - 4 = 2x + 8 --> 3x-2x=8+4 --> x=12

14_ 9x+1 = 5x - 3 --> 9x-5x= -3+1 --> 4x=-2 --> x=-2/4

15_ 10 x + 2 = 12 x + 8 -->10x-12x=8-2 --> -2x=6 --> -2x=6*(-1) --> x=-6/2 --> x=-3

16_3x+ 1 = 4x - 3 --> 3x-4x=-3-1 --> -x=-4 --> -x=-4*(-1) --> x=4

17_ 2 x + 3 = - 2x - 9 --> 2x+2x=-9-3 --> 4x=-12 --> x=-12/4 --> x=-3

18_ 2(x-1)=x+1 --> 2x-2=x+1 --> 2x-x=1+2 --> x=3

19_3(x-2)=x+1 --> 3x-6=x+1 --> 3x-x=1+6 --> 2x=7 --> x=7/2 --> x=3,5