There is no solution to the system below.
x + 3y = 7 2x + 6y = 9

Just solve x + 3y = 7 for x!

x + 3y + −3y = 7 + −3y > We have to add -3y to both sides.

x = −3y + 7

We need to substitute −3y + 7 for x in 2x + 6y = 9

2x + 6y = 9

2(−3y+7) + 6y = 9

14 = 9 > Now simplify both sides 

14 + −14 = 9+ −14 > Add -14 to both sides now!

0 = −5

So yes it is true that this has no solutions!

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.