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2³ * 4½ - (11,2 : 9½ + (-⅓) : √2 7/9)
------------------------------------------- =
(-⅔) * 2² + 9⅓ * 1 2/7
8 * 4,5 - (112/10 * 3/28 + (-⅓) : √25/9)
---------------------------------------------- =
(-⅔) * 4 + 28/3 * 9/7
36 - (12/10 + (-⅓) * 3/5)
----------------------------- =
- 8/3 + 12
36 - (12/10 - ⅕)
-------------------- =
- 8/3 + 36/3
36 - (12/10 - 2/10)
---------------------- =
28/3
36 - 10/10
------------ =
28/3
36 - 1
------- =
28/3
35
------ =
28/3
35 : 28/3 = 35 * 3/38 = 15/4 = 3¾
75% * x = 3¾
¾ * x = 15/4 /*(4/3)
x = 15/4 * 4/3
x = 5
Spr. 75% z 5 = ¾ * 5 = 15/4 = 3¾
Odp. Szukaną liczbą jest liczba 5.
Oblicz 75% liczby:
2⅓ - 4⅔ * √2²³/₄₉ + 3⁰ + 3³ = ⁷/₃ - ¹⁴/₃ * √¹²¹/₄₉ + 1 * 9 = ⁷/₃ - ¹⁴/₃ * ¹¹/₇ + 9 = ⁷/₃ - ¹⁵⁴/₂₁ + 9 = ⁴⁹/₂₁ - ¹⁵⁴/₂₁ + ¹⁸⁹/₂₁ = ⁸⁴/₂₁ = 4
75% * 4 = ¾ * 4 = 3
Odp. 75% danej liczby wynosi 3.
Znajdź liczbę a, której 25% jest równe:
∛3⅜ - (-3)² : 1½
-------------------- =
(6 - 2 * 2¼) * (1,5)⁻¹
∛²⁷/₈ - 9 : ³/₂
-------------------------- =
(6 - ²/₁ * ⁹/₄) *(³/₂)⁻¹
³/₂ - ⁹/₁ * ²/₃
----------------- =
(6 - ⁹/₂) * ²/₃
³/₂ - 6
--------------------- =
(¹²/₂ - ⁹/₂) * ²/₃
³/₂ - ¹²/₂
------------- =
³/₂ * ²/₃
- ⁹/₂
----- = - ⁹/₂ = - 4½
1
25% * a = - 4½
¼ * a = - ⁹/₂ /*4
a = - 18