пусть первое число х,тогда второе 2х,третье 2/3х
х+2х+2/3х=66
3 2/3х=66
х=66: 3 2/3
х=18
Значит первое число 18, второе 2*18=36, третье-18:3*2=12
Ответ : 18, 36, 12
Пусть
- данные числа в возростающем порядке, тогда
![c=b+\frac{a}{3};\\ b=a+\frac{c}{3};\\ a=10+\frac{b}{3}](https://tex.z-dn.net/?f=c%3Db%2B%5Cfrac%7Ba%7D%7B3%7D%3B%5C%5C+b%3Da%2B%5Cfrac%7Bc%7D%7B3%7D%3B%5C%5C+a%3D10%2B%5Cfrac%7Bb%7D%7B3%7D)
![c=b+\frac{a}{3}=a+\frac{c}{3}+\frac{a}{3}=\frac{4}{3}a+\frac{c}{3};\\ \frac{2}{3}c=\frac{4}{3}a;\\ c=2a;\\ 2a=b+\frac{a}{3};\\ b=\frac{5}{3}a;](https://tex.z-dn.net/?f=c%3Db%2B%5Cfrac%7Ba%7D%7B3%7D%3Da%2B%5Cfrac%7Bc%7D%7B3%7D%2B%5Cfrac%7Ba%7D%7B3%7D%3D%5Cfrac%7B4%7D%7B3%7Da%2B%5Cfrac%7Bc%7D%7B3%7D%3B%5C%5C+%5Cfrac%7B2%7D%7B3%7Dc%3D%5Cfrac%7B4%7D%7B3%7Da%3B%5C%5C+c%3D2a%3B%5C%5C+2a%3Db%2B%5Cfrac%7Ba%7D%7B3%7D%3B%5C%5C+b%3D%5Cfrac%7B5%7D%7B3%7Da%3B+)
![a=10+\frac{b}{3}=10+\frac{\frac{5}{3}}{3}a=10+\frac{5}{9}a;\\ \frac{4}{9}a=10;\\ a=\frac{9*10}{4}=22.5;\\ b=\frac{5}{3}a=\frac{5}{3} *22.5=37.5;\\ c=2a=2*22.5=45;\\ a+b+c=22.5+27.5+45=105](https://tex.z-dn.net/?f=a%3D10%2B%5Cfrac%7Bb%7D%7B3%7D%3D10%2B%5Cfrac%7B%5Cfrac%7B5%7D%7B3%7D%7D%7B3%7Da%3D10%2B%5Cfrac%7B5%7D%7B9%7Da%3B%5C%5C+%5Cfrac%7B4%7D%7B9%7Da%3D10%3B%5C%5C+a%3D%5Cfrac%7B9%2A10%7D%7B4%7D%3D22.5%3B%5C%5C+b%3D%5Cfrac%7B5%7D%7B3%7Da%3D%5Cfrac%7B5%7D%7B3%7D+%2A22.5%3D37.5%3B%5C%5C+c%3D2a%3D2%2A22.5%3D45%3B%5C%5C+a%2Bb%2Bc%3D22.5%2B27.5%2B45%3D105)
ответ: 105
1,8m-4,2-3,2m+4+1,7+1,4m=1,5
(1,8+1,4-3,2)*m +4+1,7-4,2=1,5
0+5,7-4,2=1,5
1,5=1,5