There is only one solution and that is 21 - 3 = 18.
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That factors to (x - 6)(x + 3) x is less than or equal to -3, 6
63/3 = 21 21 - 20 = 1 Therefore, 63/3 is greater than 20.
18, 21, 24, 27.
3x<=21 Divide both sides of the equation by 3. x<=7
3(x + 7) > 5x - 13 3x + 21 > 5x - 13 21 + 13 > 5x - 3x 34 > 2x 17 > x The solution set: {x| x < 17}