All you need is in the photo

X + Y = 1 1

X - 2y = 4 2

Solving by substitution method

X = 4 + 2y 3

Putting the value of X in equation 1

4 + 2y + y = 1

4 + 3y = 1

3y = 1 - 4

3y = (-3)

y = (-3) /3

Putting value of y in equation 3

X = 4 + 2(-1)

X = 4 - 2

a 270° rotation about point p says on e d g e n u it y (had to space it out because it says it's a misspelling so i couldn't submit it

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