That would depend on the plus or minus values of 7x and 10y of which none have been given.
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The perimeter of a triangle is the sum of the lengths of the three sides.If the three expressions in the question are in fact the lengths of thethree sides, then the perimeter is their sum.(7x + 9w) + (2x + 8y) + (2y + 5w) = 9x + 10y + 14w
2y+8y = 10y
- 7x + (9x - 3) = - 7x + 9x - 3 = 2x - 3
10y + 8y = 18y = 15 y = 15/18 y = 5/6 = 0.833333.....
9x+6 = 7x+18 9x-7x = 18-6 2x = 12 x = 6