so, the whole question basically asks you to convert the units back and forth, (its very similar to the conversion of currency) & There are many ways to do this, ill show one of the methods, if u don't understand then i can show u another way....
ill do the first two-
COUCH-
1 inch: 0.5 ft
x inch:7ft { x is the missing value ((model length of couch)) }
Let the smaller one is x so the larger is x+1 x(x+1)=1332 x^2+x=1332 x^2 +x -1332 =0 (x - 36)(x + 37) =0 so x = 36 or x = -37 therefor the larger integer is either 37 or -36
