exam Maths Puzzle Numerical Ability

can you help me figure out how to do this problem? i am having a brain hiccup

x+1/3x=8

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exam Other Question

G: P is the midpoint of MQ, Q is the midpoint of MS, Mp= 10
P: Ms= 40 A parallelogram is a quadrilateral with two pairs of parallel sides. Show that ABCD is a parallelogram if the coordinates of the vertices are A(-2,3), B(2,7), C(8,5), and D(4,1).