1. **State the problem:** We have a kite-shaped quadrilateral with sides labeled as follows: top side = $3y$, left side = $5x - 15$, right side = $2x + 3$, and bottom side = $6y - 2$. The perimeter is given as 86 ft.
2. **Recall the property of a kite:** A kite has two pairs of adjacent sides equal. So, the left side equals the top side or bottom side, and the right side equals the other adjacent side.
3. **Set up equations based on the kite property:**
- Left side equals right side: $5x - 15 = 2x + 3$
- Top side equals bottom side: $3y = 6y - 2$
4. **Solve for $x$:**
$$5x - 15 = 2x + 3$$
$$5x - 2x = 3 + 15$$
$$3x = 18$$
$$x = \frac{18}{3} = 6$$
5. **Solve for $y$:**
$$3y = 6y - 2$$
$$3y - 6y = -2$$
$$-3y = -2$$
$$y = \frac{-2}{-3} = \frac{2}{3}$$
6. **Verify the perimeter:**
Perimeter $P = 3y + (5x - 15) + (2x + 3) + (6y - 2)$
Substitute $x=6$, $y=\frac{2}{3}$:
$$P = 3 \times \frac{2}{3} + (5 \times 6 - 15) + (2 \times 6 + 3) + (6 \times \frac{2}{3} - 2)$$
$$= 2 + (30 - 15) + (12 + 3) + (4 - 2)$$
$$= 2 + 15 + 15 + 2 = 34$$
Since the sum is 34, but the problem states the perimeter is 86, the assumption that left equals right and top equals bottom is incorrect.
7. **Try the other pairings:**
Left side equals bottom side: $5x - 15 = 6y - 2$
Right side equals top side: $2x + 3 = 3y$
8. **Express $y$ from the second equation:**
$$3y = 2x + 3$$
$$y = \frac{2x + 3}{3}$$
9. **Substitute $y$ into the first equation:**
$$5x - 15 = 6 \times \frac{2x + 3}{3} - 2$$
$$5x - 15 = 2(2x + 3) - 2$$
$$5x - 15 = 4x + 6 - 2$$
$$5x - 15 = 4x + 4$$
$$5x - 4x = 4 + 15$$
$$x = 19$$
10. **Find $y$:**
$$y = \frac{2(19) + 3}{3} = \frac{38 + 3}{3} = \frac{41}{3}$$
11. **Calculate the perimeter with these values:**
$$P = 3y + (5x - 15) + (2x + 3) + (6y - 2)$$
$$= 3 \times \frac{41}{3} + (5 \times 19 - 15) + (2 \times 19 + 3) + (6 \times \frac{41}{3} - 2)$$
$$= 41 + (95 - 15) + (38 + 3) + (82 - 2)$$
$$= 41 + 80 + 41 + 80 = 242$$
This is too large, so the perimeter does not match 86.
12. **Use the perimeter equation directly:**
$$3y + (5x - 15) + (2x + 3) + (6y - 2) = 86$$
Simplify:
$$3y + 5x - 15 + 2x + 3 + 6y - 2 = 86$$
$$5x + 2x + 3y + 6y - 15 + 3 - 2 = 86$$
$$7x + 9y - 14 = 86$$
$$7x + 9y = 100$$
13. **Use the kite property: adjacent sides equal. Try left = right:**
$$5x - 15 = 2x + 3$$
$$3x = 18$$
$$x = 6$$
14. **Substitute $x=6$ into perimeter equation:**
$$7(6) + 9y = 100$$
$$42 + 9y = 100$$
$$9y = 58$$
$$y = \frac{58}{9}$$
15. **Final answers:**
$$x = 6, \quad y = \frac{58}{9}$$
Kite Perimeter
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