exam Maths Puzzle Numerical Ability

The first angle of a triangle is three times the measure of the third angle. The second angle is five less that the third angle. Find the measure of each angle.

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exam Other Question

alex is 2 years older than dulce. if the sum of their ages is 54. how old is alex? Twice the square of a positive integer is 12 more than 10 times that integer. What is the integer?

10(x)^2 = x + 12


I know I have to have a formula first. Am I on the right track for the formula in order to solve this problem?