Question

3) allen el valor de la x
c) 3×(x+1)=2×x+5
d) (2x+4)÷2=5
e) 6×x+2=18+2×x
f) 3×(2×x+3)=5×x+12​

Answer 1

c) 3(x+1) = 2x+5

   3x+3 = 2x+5

   3x-2x = 5-3

          x = 2

d) $\frac{2x+4}{2} = 5$

    x+2 = 5

        x = 5-2

        x = 3

e) 6x+2 = 18+ 2x

   6x -2x = 18 -2

         4x = 16

           x = 4

f) 3(2x+3) = 5x+12

  6x+9 = 5x+12

  6x-5x = 12-9

          x =3