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the perimeter of a triangle is 13x + 8y. one of its sides has a length of 7x + 3y and another side length of 4x + 2y. what is the length in terms of x and y for the third side?

User Mohammad F
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The perimeter of a triangle is equal to the addition of its three sides.

side 1 + side 2 + side 3 = perimeter

The perimeter of a triangle is 13x + 8y, one of its sides has a length of 7x + 3y and another side length of 4x + 2y, then

(7x + 3y) + (4x + 2y) + side 3 = 13x + 8y

(7x + 4x) + (3y + 2y) + side 3 = 13x + 8y

11x + 5y + side 3 = 13x + 8y

side 3 = 13x + 8y - 11x - 5y

side 3 = (13x - 11x) + (8y - 5y)

side 3 = 2x + 3y

User Undershock
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