a movie buff owns movies on dvd and on blu - ray in a ratio of 9 : 2 . if she buys 2 more blu - ray movies , that ratio would change to 17 : 4 . if she owns movies on no other medium , what was the original number of movies in her library before the extra purchase ?
"if u can just keep an eye on the options 99 is the only multiple of 9 in options given . . so you can mark it wid in seconds . now coming to the process m ( d ) = 9 x and b ( d ) = 2 x now from the next line the new eqn becomes 9 x / ( 2 x + 2 ) = 17 / 4 solving it 36 x = 34 x + 34 x = 17 which means m ( d ) = 153 and b ( d ) = 34 so total initially is m ( d ) + b ( d ) = 187 e"
multiply(divide(multiply(17, add(2, const_1)), subtract(multiply(4, 9), multiply(17, 2))), add(9, 2))