exam Maths Puzzle Numerical Ability

Multiply: [ (1/2)x+(1/3)] [(1/2)x-(1/4)]

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exam Other Question

Could you please help me solve this system of equations?

5x+3y+z=-13
x-3y+2z=1
14x-2y+3z=-16 The lenght of a rectangular yard is 25ft more than its width. If the width were doubled, the area of the yard would be 1800ft2. Find the dimensions of the yard.