Question

AN ORCHESTRA CONSISTS OF STRINGS INSTRAMENTS AND WIND INSTIMENTS IN A RATIO OF 9 TO 4. THERE ARE 91 STRINGS AND WIND INSTRUMENTS IN THE ORCHESTRA. hOW MANY STRING INSTRUMENTS ARE THERE? how many wind instruments? Use a system of equation to model each situation. solve by any method.
Reiny
let the number of string instruments be 9x
let the number of wind instruments be 4x

(notice 9x:4x = 9:4)

then 9x + 4x = 91

I will let you finish it.
key
7x
mom
63 wind and 28 string