It is known that the living room area is 21 square meters more than the bathroom area, and the total

1) The total ground area is expressed in an algebraic formula containing x and y;

2) It is known that the living room area is 21m2 more than the bathroom area, and the total ground area is 15 times the bathroom area If the average cost of laying 1m2 floor tiles is 80 yuan, then how much is the total cost of laying floor tiles?

Is this it? 1)6x+2y+2*3+4*3

2) Solution: The living room is x meters long and the bathroom is y meters wide.

6x=15*2y

6x-2y=21

The solution is x=4, y=

The total area is 45 square meters.

45*80=3600 yuan.

That's exactly what I did today's homework, hehe

Set the width of the living room to X and the length of the bathroom to Y, to get 6X-2Y=21 6X+2Y+6+12=30Y to get X=26|39

What do you want to know? If you don't understand 6x-2y=21 and 6x=30y-18, you get x=, y=

I asked how big the house was.

What is the problem?