Question

2) Resolva as equações:
a) 4x - 1 = 3(x - 1)
b) 3(x - 2) = 2x - 4
c) 3(x - 2) = 4(3 – x)
d) 3(3x – 1) = 2(3x + 2)
e) 7(x - 2) = 5(x + 3)
f) 3(2x - 1) =- 2(x + 3)
g) 4(x + 10) – 2(x – 5) = 0
h) 3(2x + 3) - 4(x - 1) = 3
i) 2(3 – x) = 3(x - 4) + 15
j) 3(5 - x) - 3(1 – 2x) = 42
k) (4x + 6) - 2x = (x – 6) + 10 + 14
l) (x – 3) - (x + 2) + 2(x - 1) – 5 = 0
m) 5(x – 3) – 4(x + 2) = 2 + 3​

Answer 1

Resposta:

Explicação passo-a-passo:

a) 4x - 1 = 3 ( x - 1)

    4x - 1 = 3x - 3

     4x - 3x = -3 + 1

              x = -2

b) 3 ( x - 2 ) = 2x - 4

     3x - 6 = 2x - 4

       3x - 2x = - 4 + 6

                 x = + 2

c) 3 ( x - 2 ) = 4 ( 3 - x )

    3x - 6 = 12 - 4x

     3x + 4x = 12 + 6

          7x = 18

            x = 18/7

d) 3 ( 3x - 1 ) = 2 ( x + 3 )

         9x - 3 = 2x + 6

       9x - 2x = 6 + 3

               7x = 9

                 x = 9/7

e) 7 ( x - 2 )  = 5 ( x + 3 )

       7x - 14 = 5x + 15

       7x -5x = 15 + 14

          2x = 29

             x = 29 /2