Question

URGENTE
resolva as equaçoes
a) -6y=81
b) -5x-5= 25
C) -11x+121= -121
d) -3y=-81
e) 12x -42=102

Answer 1

Resposta:

a) -6y=81

      y = 81/-6

      y = -13,5

b) -5x-5= 25

   -5x = 25 + 5

   -5x = 30

      x = 30/-5

      x = -6

C) -11x+121= -121

   -11x = -121 -121

   -11x = -242

      x = -242/-11

      x = +22

d) -3y=-81

      y = -81/-3

      y = +27

e) 12x -42=102

   12x = 102 + 42

   12x = 144

       x = 144/12

       x = 12

Explicação passo a passo: