Question

Perimeter of rectangle is 42 cm express this info in the form of a linear equation in two variables​

Answer 1

let length=x,breadth =y

perimeter =42

2(x+y)=42

x+y=21

Answer 2

here is your answer:

length = x
breadth = y

linear equation - 2(x+y) = 44
as perimeter of rectangle = 2(l+b)