Question

1,2,4 urgent va rog
Multumesc anticipat

Answer 1

1) a - b = 132
a = 5b + 12
5b+12 - b = 132
4b + 12 = 132
4b = 120
b = 30
a= 5*30 + 12
a = 150 + 12
a = 162

2) a + b = 287
   a = 12 + b/4
  12 + b/4 + b = 287
  b/4 + b = 275
  5b = 1100
 b = 220
a = 12 + 220/4
a = 12 +55
a = 67