book Maths Puzzle Numerical Ability

-12q+4=8q-6

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book Other Question

what is 5.40% of 83 and how can i work out the percentage of a number on my own in the future? Suppose you have a three quart pail and an eight quart pail with no marking on either pail. How can you use these pails to get exactly four quarts of water in the largest pail?