Question

Encontre o valor das incoenitas.
a) 11 . N +77=132
b) 7 . N-12=200
c) 4 . N +5=7
d) 8 . N + 52=12
e) (n (dividir) 3)-7=-2

Answer 1

11n + 77 = 132
11n = 132 - 77
11n = 55
n = 55/11
n = 5
++++++++++++++++++++++++++++++++++++++++++++==
7n - 12 = 200
7n = 200 + 12
7n = 212
n = 212/7
+++++++++++++++++++++++++++++++++++++++++++++++++++
4n + 5 = 7
4n = 7 + 5
4n = 12
n = 12/4
n = 3
++++++++++++++++++++++++++++++++++++++++++++++++++++
8n + 52 = 12
8n = 12 - 52
8n = - 40
n = - 40/8
n = - 5
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  n
----- - 3 = - 2
  3 

  n
----- = - 2 + 3
  3

  n        1
----- = ----
  3        1  
                     multiplique cruzado
n = 3