Question

resolva as equacoes

a) 4× - 1 = 3 (× - 1 )

B) 3(× - 2) = 2× - 4
C) 2(× - 1) = 3× + 4

D) 3(× - 1) - 7 = 15

Answer 1

a) 4x - 3x = - 1 + 1
       x = 0

b)  3x - 2x = - 4 + 6
           x =  2

c) 2x - 3x = 4 + 2
          - x =  6 .( - 1)
           x = - 6

d0 3x - 3 - 7 = 15
            3x = 15 + 3 + 7
            3x = 15 + 10
              3x = 25

                  x= 25 / 3

Espero ter te ajudado.