Like containing a fire?
then use anything to cut out the oxygen (like a bucket or a spoon if it’s a tiny flame)
Combine like terms.
2x + 6 + 6x - 1
8x + 5
if the length is 8ft and the width is (7+x) then the area would be 56+8x, if x is unknown.
The equations would be 5000(1+0.02)^3 and the answer is $5306.04