Question

x supra 5=y supra 3=z supra 7 si x+2y-z=192

Answer 1

x/5 =y /3 = z/7 = k=>
=>x= 5k
y = 3 k
z = 7k
x + 2y - z = 192
5k +6 k - 7 k = 192
4k = 192
k =  192 / 4 =48
x = 240
y = 144
z =336
/ = supra