So I'm giving away 100 points I'm in a good mode so make the best of them.

fvgbhn

Step-by-step explanation:

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ok do I have to do something? or just because?

y=mx+b is the final answer!   : )

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