Let x be the number of balloons., 0.80x + 18.60≤ 25.00, or, Find the maximum quantity of balloons that Raj could buy within the budget:, 0.8x + 18.6≤ 25, 0.8x≤ 25 - 18.6, 0.8x/0.8≤ 6.4/0.8,