SOLUTION: The area of a rectangle is 77m^2, and the length of the rectangle is 10m less than three times the width. Find the dimensions of the rectangle.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: The area of a rectangle is 77m^2, and the length of the rectangle is 10m less than three times the width. Find the dimensions of the rectangle.      Log On


   

Question 1144053: The area of a rectangle is 77m^2, and the length of the rectangle is 10m less than three times the width. Find the dimensions of the rectangle.
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
w%283w-10%29=77, if w is for width
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Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.

w*(3w-10) = 77,


where "w" is the width.


If you look in this equation and think 10 - 20 - 30 seconds on it, you will find (you will guess) its solution MENTALLY : w = 7 meters.