Ответ:
84;54;42
F=x;
D=2x;
E=2x-30
x+2x+2x-30=180
5x=210
x=42
F=42; D=2×42=84; E=2×42-30=84-30=54
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Ответ:
84;54;42
F=x;
D=2x;
E=2x-30
x+2x+2x-30=180
5x=210
x=42
F=42; D=2×42=84; E=2×42-30=84-30=54