exam Maths Puzzle Numerical Ability

( 13.0 - 2 3/8 ) + ( 1 1/2 ) / 1.125 x 1.75

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exam Other Question

ax/x+y,bx/x-y,c/2x+2y if the fractions are rewritten as equivalent fractions with the least common denominator , they have the form of? Is --x^2 = x an identity (true for all values of x)?