exam Maths Puzzle Numerical Ability

what property is b+-b=0

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exam Other Question

A 35% alcohol solution is to be made by mixing 2 liters of 8% solution with pure alcohol. How much pure alcohol is required? Create a table with headings that include units, show equation, solve and include units in your answer.


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Solve the following quadratic equations by factoring
x^2 -9x - 4 = 6