7. The adjacent sides of a rectangle are -67° +7x+ y + xy and 7xy - 5

1.	7. The adjacent sides of a rectangle are -67° +7x+ y + xy and 7xy - 5x + 9xy. Find its perimeter.The perimeter of a triangle is 7x - 17xy + 15y + 8 and two sides are 3x2 - 6xy + 4y? - 5 and21-9xy + 6y + 6. Find the third side of the triangle8.the length was
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7. The adjacent sides of a rectangle are -67° +7x+ y + xy and 7xy - 5x + 9xy. Find its perimeter.The perimeter of a triangle is 7x - 17xy + 15y + 8 and two sides are 3x2 - 6xy + 4y? - 5 and21-9xy + 6y + 6. Find the third side of the triangle8.the length was

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