exam Maths Puzzle Numerical Ability

translate the following statement into an algebraic equation .let x respresent the number .9 more times than 3 times a number is 10 times that same number.

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exam Other Question

How much of a 35% alcohol solution shoud be mixed with 2 liters of a 60% alcohol solution to produce a 50% alcohol solution? The sum of two numbers is 36. their difference is 12. What are the two numbers?