Question

determinati numerele x,y,z direct proportionale cu numerele 3,4 si 6 stiind ca z - y + x = 10

Answer 1

x/3=y/4=z/6 =k
x/3=k, x = 3k
y/4=k, y = 4k
z/6=k, z = 6k

z-y+x = 10
6k-4k+3k = 10
2k+3k = 10
5k = 10
k = 10:5
k = 2
x = 3k = 3*2 = 6
y = 4k = 4*2 = 8
z = 6k = 6*2 = 12
V:  12-8+6 = 4+6 = 10