3*(12-20:4))=21
вот вроде так
А) |х|=67,85
{х=67,85
{х=-67,85
б) |у|=-5
у=нет решений
Сократить дробь 48/96 48/96,204/255,750/1875,27/36,64/128,182/208,384/640,60/72,80/100,304/380,150/450
Александр Грязин [10]
<span>48/96 = </span>¹/₂<span>
204/255 = </span>⁶⁸/₈₃
<span>750/1875 =</span>¹⁵⁰/₃₇₅<span>
27/36 = </span>³/₄<span>
64/128 = </span>⁸/₁₆ = ¹/₈<span>
182/208 = </span>⁹¹/₁₀₄<span>
384/640 = </span>⁴⁸/₈₀ = ⁶/₁₀ = 0,6<span>
60/72 = </span>⁵/₆<span>
80/100 = </span>⁸/₁₀ = ²/₅<span>
304/380 = </span>⁷⁶/₉₅<span>
150/450 = </span>¹⁵/₄₅ = ¹/₃
( 11+15 + 14) : 2 = 40 : 2 = 20чашек