Question

Complete corretamente as igualdades:
a)(-50):(?)= -10
b)(?)-(-19)= -46
c)(?)+(-25)= -8
Agradeço a ajuda de todos!

Answer 1

a)

- 50 : x = - 10

- 50         - 10
-------  =
  x 

- 50 = - 10x   (-1)
50 = 10x
10x = 50
x = 50/10
x = 5
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)

x - ( - 19) = - 46
x + 19 = - 46
x = - 46 - 19
x = - 65
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
c)

x + ( - 25) = - 8
x - 25 = - 8
x = - 8 + 25
x = 17