Question

determine a raiz das equações a seguir (a)2x=16
(b)x+7=25
(c)3x-1=14
(d)3x+4=x+10
(e)11x-5=7-x

Answer 1

(a)2x=16

       x = 16/2

      x = 8

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(b)x+7=25

    x = 25 - 7

   x = 18

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(c)3x-1=14

    3x = 14 + 1

     3x = 15

      x = 15/3

      x = 5

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 (d)3x+4=x+10

     3x - x = 10 - 4

            2x = 6

               x = 6/2

                 x = 3

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 (e)11x-5=7-x

       11x + x = 7 + 5

                  12x = 12

                       x = 12/12

                        x = 1

Answer 2

a)
2x=16
x=16/2
x=8

b)
x+7=25
x=25-7
x=18

c)
3x-1=14
3x=14+1
3x=15
x=15/3
x=5

d)
3x+4=x+10
3x-x=10-4
2x=6
x=6/2
x=3

e)
11x-5=7-x
11x+x=7+5
12x=12
x=1