exam Maths Puzzle Numerical Ability

2x + 3y = 6 (for x)

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exam Other Question

what property states that a=b is the same as b=a?
plz i need to know this for tomorrow... plz give me the answer fast... Im sorry for the inconvenience... If one riveter can do a job in 12 days, and a second riveter can do it in 16 days, how long would it take them to do it together?