Consider the system y=3x+5 y=ax+ b

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

55 because 55 + 55 = 110 good luck babe

2+2=4

4-5=-1

is that your

the one where 1 and 2 are directly across from each other.  

see image