The perimeter of a triangle is 12a +7b -6c cm . If two of its sides are 7a - 6b and 4a + 3b cm , find the length of its third side
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Answer:
a + 10b - 6c
Step-by-step explanation:
Let the third side be x
Perimeter = 12a + 7b - 6c
Perimeter = sum of three sides
12a + 7b - 6c = 7a - 6b + 4a + 3b + x
12a + 7b - 6c = 11a - 3b + x
12a + 7b - 6c - 11a + 3b = x
a + 10b - 6c = x
Thus the third side is a + 10b - 6c
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