Question

Calcule as equações
A)16+8x=3x+81
B)5x=+12x+49
C)2-3x=-9-4x
D)3x-15=-2x+5
E)4. (X+10)=2x-10

Answer 1

A)16+8x=3x+81

   8x - 3x = 81 - 16

           5x = 65

             x = 65/5

             x = 13

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B)5x=+12x+49

  5x - 12x = 49

         - 7x = 49

            - x = 49/7 (-1)

              x = -7

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C)2-3x=-9-4x

     - 3x + 4x = -9 - 2

                x = -11

_______________________

D)3x-15=-2x+5

   3x + 2x = 5 +15

           5x = 20

             x = 20/5

             x = 4

____________________________

E)4. (X+10)=2x-10

   4x + 40 = 2x - 10

      4x - 2x = - 10 - 40

             2x = - 50

               x = - 50/2

               x = - 25

bons estudos

Answer 2

A)8x-3x=81-16
5x=65
x=10,83

B)5x=+12x+49
5x-12x=49
-7x=49 .(-1)
7x=-49
x=-49
7
x=-7

C)2-3x=-9-4x
-3x+4x=-9-2
x=-11

D)3x-15=-2x+5
3x+2x=5+15
5x=20
x=20
5
x=4

E)4.(x+10)=2x-10
4x+40=2x-10
4x-2x=-10-40
2x=-50
x=-50
2
x=-25