How to subtract 9 from double 14

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.