What is 7/14 fractions im in class and i dont know.? Can anyone help me.

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

Will give a: 122 b: 90 c: 48 d: 180

Change negative exponents to positive. then solve. round to four decimal places