Question

ПОМОГИТЕ ПОЖАЛУЙСТА , 30 БАЛЛОВ

Answer 1

Ответ:

1) $x = 3,75$

2) $x = -\frac{90}{17}$ или $-5\frac{5}{17}$

3) $x= -\frac{2015}{216}$ или $-9\frac{71}{216}$

4) $y=-\frac{34}{3}$ или $-11\frac{1}{3}$

Пошаговое объяснение:

1)

$(x-3,75)*(-4,756)=0$

$-4,756x + 17,835 = 0$

$-4,756x = -17,835$

$x = 3,75$

2)

$(5\frac{5}{17} +x)*(5\frac{1}{9} - 2\frac{5}{18} ) = 0$

$(\frac{90}{17} +x)*(\frac{46}{9} - \frac{41}{18} ) = 0$

$(\frac{90}{17} +x) * \frac{17}{6} = 0$

$15 + \frac{17}{6} x=0$

$90+17x=0$

$17x=-90$

$x=-\frac{90}{17}$ или $-5\frac{5}{17}$

3)

$x:(-5\frac{5}{12} ) = 9-7\frac{5}{18}$

$x: (-\frac{65}{12} ) = 9 - \frac{131}{18}$

$-x * \frac{12}{65} = \frac{31}{18}$

$-\frac{12}{65} x= \frac{31}{18}$

$-\frac{65}{12} *(-\frac{12}{65})x = -\frac{65}{12} * \frac{31}{18}$

$\frac{65}{12} *\frac{12}{65} x= -\frac{65}{12} * \frac{31}{18}$

$\frac{1}{12} * 12x = -\frac{65}{12} * \frac{31}{18}$

$x=-\frac{65}{12} * \frac{31}{18}$

$x = -\frac{2015}{216}$ или $-9\frac{71}{216}$

4)

$y:4\frac{2}{3} = 8-10\frac{3}{7}$

$y : \frac{14}{3} = 8 - \frac{73}{7}$

$y*\frac{3}{14} = -\frac{17}{7}$

$\frac{3}{14} y = -\frac{17}{7}$

$\frac{14}{3} * \frac{3}{14} y = \frac{14}{3} * (-\frac{17}{7} )$

$\frac{1}{3} * 3y = \frac{14}{3} * (-\frac{17}{7} )$

$y=\frac{14}{3} *(-\frac{17}{7} )$

$y=-\frac{14}{3} * \frac{17}{7}$

$y=-\frac{2}{3} *17$

$y=-\frac{34}{3}$ или $-11\frac{1}{3}$