exam Maths Puzzle Numerical Ability

Question on page 137. Please help me with this question. Three more than 4 times a number is equal to 9 less than twice the number.

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is: 5x to the second + 35x + 60 = a collection of 50 coins is worth $5.20. There are 12 more nickels than dimes, and the rest of the coins are quarters. How many coins of each type are in the collection? Thank you