Question

пж помогите сделаю лучшии ответ и 100 баллов​

Answer 1

Ответ:

Пошаговое объяснение:

1) $\frac{72}{80} - x +\frac{12}{80} =\frac{15}{80}$

$\frac{84}{80} - x = \frac{15}{80}$

$x = \frac{84}{80} - \frac{15}{80} \\x= \frac{69}{80}$

2) $x+\frac{7}{50} = \frac{3}{50}$

$x = \frac{7}{50} +\frac{3}{50} \\x= \frac{10}{50} = \frac{1}{5}$

3) $\frac{75}{125} - x = \frac{24}{125}$

$x = \frac{75}{125} - \frac{24}{125} \\x= \frac{51}{125}$

4) $\frac{20}{40}+ y = \frac{37}{40}$

$y = \frac{37}{40} - \frac{20}{40} \\x=\frac{17}{40}$

Answer 2

Ответ:

Пошаговое объяснение:

$\frac{72}{80} - (x-\frac{12}{80} )=\frac{15}{80} \\\\72-x-12=15\\-80x=15-72+12\\-80x=45\\x = \frac{45}{-80} = -\frac{9}{16} \\\\\\x+\frac{7}{50} = \frac{3}{50} +\frac{27}{50} \\\\50x + 7 = 3 + 27\\50x = 30 - 7\\50x = 23\\x=\frac{23}{50} \\\\\\\frac{116}{125} - (\frac{41}{125}+x )=\frac{24}{125} \\\\116 - 41 + 125x = 24\\125x = 24 - 116 + 41\\125x = 50\\x = \frac{50}{125} = \frac{2}{5}$

$\frac{4}{40} +y+\frac{16}{40} =\frac{31}{40} +\frac{6}{40} \\\\4+40y+16=31+6\\40y=37-4-40\\40y=-7\\y=-\frac{7}{40}$