Determined to fill her water balloons before Diego, Lin fills her balloons at a rate of `\frac{1}{3}` an ounce per second. She has already filled balloons with 8 ounces of water. Diego has filled balloons with 6 ounces of water. He continues to fill balloons at a rate of `\frac{2}{3}` an ounce per second. Let x represent the seconds. Let y represent the ounces of water.