the sides of triangle are 3x+7,4x-3 and 5x+3. Find the sides of the triangle if it's perimeter is 55 units.
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perimeter of triangle is sum of all sides.
3x+7+4x-3+5x+3=55
12x+7=55
12x=55-7
12x=48
x=48/12
x=4
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