Question

Tìm x

a)/x+1/-5=0

b)/x-7/++x-7=0

Answer 1

l x + 1 l - 5 = 0

l x + 1 l      = 0 + 5 = 5

  x + 1 = 5

  x       = 5 - 1 = 4

 

x + 1 = -5

x       = -5 - 1 = - 6