exam Maths Puzzle Numerical Ability

How many cans each with a capacity of 3/8 gallon can be filled from 2 barrels of oil each containing 31 1/2 gallons?

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exam Other Question

3x/x-1 + 6x-9/x-1 -6 =0 solve for x. the numbers in front are fractions Solve the following equation for x, and check your results.
7(3x + 4) = 8(2x + 5) + 13