Question

determinand x, y, z stiind ca​ matematica scuze

Answer 1

Explicație:

x/3=y/5=z/9=k

=>x=3k y=5k z=9k

b)3k+9k-5k=7k=21 =>k=3

=>x=9 y=15 z=27

c) 10k+9k+36k=55k=440 =>k=8

=>x=24 y=40 z=72

d)9k²+25k²+81k²=115k²=1035 =>k²=9 =>k=3

=>x=9 y=15 z=27

e)15k²+45k²+27k²=87k²=1392 =>k=16

=>x=48 y=80 z=144

f)7×9k² + 9×25k² - 2×81k²=63k²+225k²-162k²=126k²

=>k²=2016/126 =>k²=16 =>k=4

=>x=12 y=20 z=36