The statement formed when an equal sign is placed between two expressions is called

An equation

Step-by-step explanation: In math a equal sign put in between two expressions is called an equation.    :)

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540