Ответ:
ё) х= - 4. 119/234
ж) х= 39. 1/5
з) х= 0,8
Пошаговое объяснение:
решение на фото
[tex]\displaystyle 1)\ \ -8\frac{7}{39}-3x=5\frac{9}{26}\\\\\\3x=-8\frac{7}{39}-5\frac{9}{26}\ \ ,\ \ 3x=-13-\Big(\frac{7}{39}^{|2}+\frac{9}{26}^{|3}\Big)\ \ ,\ \ 3x=-13-\frac{14+27}{78}\\\\\\3x=-13-\frac{41}{78}\ \ ,\ \ \ 3x=-\frac{1055}{78}\ \ ,\ \ x=-\frac{1055}{3\cdot 78} \ \ ,\ \ \boxed{x=-4\frac{119}{234}}[/tex]
[tex]\displaystyle 2)\ \ \frac{1}{7}\, x+\frac{3}{14}\, x=14\\\\\\\frac{2+3}{14}\, x=14\ \ ,\ \ \ \frac{5}{14}\, x=14\ \ ,\ \ \ x=\frac{14\cdot 14}{5}\ \ ,\ \ \ \boxed{x=39,2}[/tex]
[tex]3)\ \ 3,6+2x-5x=1,2\\\\2x-5x=1,2-3,6\\\\-3x=-2,4\\\\x=2,4:3\\\\\boxed{x=0,8}[/tex]
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Answers & Comments
Ответ:
ё) х= - 4. 119/234
ж) х= 39. 1/5
з) х= 0,8
Пошаговое объяснение:
решение на фото
Verified answer
Ответ:
[tex]\displaystyle 1)\ \ -8\frac{7}{39}-3x=5\frac{9}{26}\\\\\\3x=-8\frac{7}{39}-5\frac{9}{26}\ \ ,\ \ 3x=-13-\Big(\frac{7}{39}^{|2}+\frac{9}{26}^{|3}\Big)\ \ ,\ \ 3x=-13-\frac{14+27}{78}\\\\\\3x=-13-\frac{41}{78}\ \ ,\ \ \ 3x=-\frac{1055}{78}\ \ ,\ \ x=-\frac{1055}{3\cdot 78} \ \ ,\ \ \boxed{x=-4\frac{119}{234}}[/tex]
[tex]\displaystyle 2)\ \ \frac{1}{7}\, x+\frac{3}{14}\, x=14\\\\\\\frac{2+3}{14}\, x=14\ \ ,\ \ \ \frac{5}{14}\, x=14\ \ ,\ \ \ x=\frac{14\cdot 14}{5}\ \ ,\ \ \ \boxed{x=39,2}[/tex]
[tex]3)\ \ 3,6+2x-5x=1,2\\\\2x-5x=1,2-3,6\\\\-3x=-2,4\\\\x=2,4:3\\\\\boxed{x=0,8}[/tex]