The length of a rectangle is 3 feet less than twice the width. the area is 65 square feet. find the length and width

It's a lot to take in, isn't it ? I started off by confirming the formula a=lb

a=lb
65= (x×2)-3×x

l=(x×2)-3
b=x
a=65

Now I tried plugging in random values. Eventually I came up with this ;

65= (6.5×2)-3×6.5
65= 13-3×6.5
65 = 10×6.5
65=65

Length = 10feet
Width = 6.5feet

Aand b are correctly balanced reactions. they have the same number of atoms in both sides of the reaction