Tony purchases 20 black pens along with some blue pens. He spends $155 in total. The black pens cost $6 each and the black pens cost $5 each. If b
represents the number of blue pens, which of the following equations can be
used to determine how many blue pens Tony purchased?

step-by-step explanation:

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

4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4

wait nvm i know the correct answer now its 100%   81 square feet

~batmans wife dun dun