Question 759528
Breadth = x
Length = x + 5
Perimeter = 2*width + 2*length
     70m  = 2(x) + 2(x + 5)
     70m  = 2x + 2x + 10
     70m  = 4x + 10
Collect like terms.
Remember to change signs as you cross the =
   70m - 10 = 4x
     4x = 60
      x = 15m
Breadth = 15m Length = 20m.
Hope this helps.
:-)