What is the length of each side of a triangle that has a perimeter of 30 inches?

The perimeter of a triangle is 30 inches.  The first side of triangle is 1 inch longer than the second side.  The second side is 7 inches longer than the third side. What is the length od each side of the triangle?
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1 Answer

triangel with rim leng=30

side1=side2+1

side2=side3+7, thus side1=side3+8

rim leng=(side3+8)+(side3+7)+side3

=3*side3+15=30

3*side3=15

side3=5

side2=12

side1=13
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