a roll of carpet is 9ft wide is 30 ft longer than a roll of carpet 15 ft wide. both rolls have the same area.find the dimemsions of each.
L1 = L2 + 30
Area = Area
9 * L1 = L2 * 15
9 * (L2 + 30) = L2 * 15
Solve for L2, put that value in the first equation to find L1. To check, put both values in the second equation.