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Maths Puzzle
Numerical Ability
(-6n+13)(-3)
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book Other Question
Find two positive integers whose sum is 48, and whose sum also equals twice their difference. What is the smaller and lager integer?
A chemist wants to mix a 75% acid solution with a 35% acid solution to produxe 400 ml of a 50% acid solution. How many ml of each solution should he use? Could someone show me how to do this problem? Thank you.