Chong thinks of a Number adds 10 and then multiplies the number so obtained by 3, and get 42. If the number is n then write an equation for this

The equation for this is:

Step-by-step explanation:

We have that the number though is n.

Adds 10:

This means that now we have:

Multiplies by 3:

This means that now we have:

Gets 42:

This means that:

add an image

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