if the perimeter of a triangle is 8x -7 and two sides are 3x+5 and 2x-3 find the third side
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Answer:
y = 3x - 5
Step-by-step explanation:
We know that the perimeter of a triangle, or any shape for that matter, equals to the sum of all the sides of the triangle or that particular shape.
Given:
2 sides:
3x + 5 and 2x - 3.
The perimeter: 8x - 7
Let the third side be y.
3x + 5 + 2x - 3 + y = 8x - 7
5x - 2 + y = 8x - 7
∴ y = 8x - 7 - (5x - 2)
= 8x - 7 - 5x + 2
y = 3x - 5
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