exam Maths Puzzle Numerical Ability

the perimeter of a triangle is 41 cm. the measure of the shortest side is 7 cm less than the middle side. the measure of the longest side is 5 cm less than the sum of the other 2 sides. find the lengths of the sides.

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exam Other Question

Kevin is three times as old as Bob. Three years ago the sum of their ages was 22yr. How old is each now? Find the variation constant and an equation of variation where y varies directly as x and y=8 when x=4.
The variation constant is k=_.
The equation of variation is y=_