Пошаговое объяснение:
Х/у=1/4 => х=у/4
У/z=8/9 => y=8z/9
X=8z/9 : 4=8z/9×1/4=2z/9
X+y+z=19
2z/9+8z/9+z=19
2z+8z+9z=171
19z=171
Z=9
X=2z/9=2×9/9=2
y=8z/9=8×9/9=8
2+8+9=19
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Пошаговое объяснение:
Х/у=1/4 => х=у/4
У/z=8/9 => y=8z/9
X=8z/9 : 4=8z/9×1/4=2z/9
X+y+z=19
2z/9+8z/9+z=19
2z+8z+9z=171
19z=171
Z=9
X=2z/9=2×9/9=2
y=8z/9=8×9/9=8
2+8+9=19