book Maths Puzzle Numerical Ability

solve ea. proportion

m-1/m-2=m-3/m+4

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book Other Question

A collection of nickels, dimes and quarters has a value of $7.50. If there are 3 fewer dimes than nickels and twice as many quarters as nickels, how many dimes are there? Solve the inequality, and express the solutions in terms of intervals when possible. 4 is equal to or greater than 3x + 5 > -1.