exam Maths Puzzle Numerical Ability

3(1+d)-5=3d-2

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Please help!
(2x1/2y1/3) (-3x1/3y1/6)
the 1,2 and 1,3 in first eqaution and 1/3 and 1/6 in second are the powers. I dont know how to solve. please help. Thank you!
The average price of 3 mugs is $4, one of the mugs cost $p and another mug cost $3...express the price of the 3rd mug in terms of p...