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toseshevaanna
@toseshevaanna
July 2022
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уауаауауауауаау ЗНАТОКИ, прошу помощи
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MaxikMK
3^(x+3) * 5^(x-1) - 15^x = 14850,
3^х * 3³ * 5^х : 5 - 5^х * 3^х = 14850,
5^х * 3^х (3³:5 - 1) = 14850,
15^x = 3375,
15^х = 14850 : (27:5-1),
15^x = 15^3,
x = 3.
Ответ под пунктом 5) 3.
1 votes
Thanks 2
OlgaOrlova99
3^(х+3) × 5^(х-1) - 15^х = 14850
3^х × 3³ × 5^х × 5^(-1) - 15^х = 14850
(3×5)^х × 27 × (1/5) - 15^х = 14850
15^х × 5,4 - 15^х = 14850
15^x × (5,4 - 1) = 14850
15^х × 4,4 = 14850
15^х = 14850/4,4
15^х = 3375
15^х = 15³ => х = 3
Ответ: 5) 3.
2 votes
Thanks 2
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Answers & Comments
3^х * 3³ * 5^х : 5 - 5^х * 3^х = 14850,
5^х * 3^х (3³:5 - 1) = 14850,
15^x = 3375,
15^х = 14850 : (27:5-1),
15^x = 15^3,
x = 3.
Ответ под пунктом 5) 3.
3^х × 3³ × 5^х × 5^(-1) - 15^х = 14850
(3×5)^х × 27 × (1/5) - 15^х = 14850
15^х × 5,4 - 15^х = 14850
15^x × (5,4 - 1) = 14850
15^х × 4,4 = 14850
15^х = 14850/4,4
15^х = 3375
15^х = 15³ => х = 3
Ответ: 5) 3.