# SOLUTION: If the sides of a square are lengthened by 7 cm, the area becomes 144cm^2. Find the length of a side of the original square. The length of a side of the original square is _____

Algebra ->  Algebra  -> Surface-area -> SOLUTION: If the sides of a square are lengthened by 7 cm, the area becomes 144cm^2. Find the length of a side of the original square. The length of a side of the original square is _____      Log On

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 Geometry: Area and Surface Area Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Surface-area Question 143768: If the sides of a square are lengthened by 7 cm, the area becomes 144cm^2. Find the length of a side of the original square. The length of a side of the original square is _____ cm. Answer by rapaljer(4667)   (Show Source): You can put this solution on YOUR website!Let x = original side x+7 = increased side Area = s^2 = (x+7)^2 = 144 Take the square root of each side: x+7 = 12 (it can't be a negative 12!) x=5 cm. R^2