Question

допоможіть будь ласка даю 50 балів​

Answer 1

Ответ:

Пошаговое объяснение:

39/14х-41/21х=5/4

117/42х - 82/42=5/4

35/42х=5/4

Х=5/4×5/6=25/24=1 1/24

Answer 2

Ответ:

Пошаговое объяснение:

$\displaystyle\\\2\frac{11}{14} x-1\frac{20}{21} x=1\frac{1}{4} \\\\\\\frac{14\cdot2+11}{14} x-\frac{21+20}{21} x=\frac{5}{4} \\\\\\\frac{39}{14} x-\frac{41}{21} x=\frac{5}{4} \\\\\\\frac{39\cdot3-41\cdot2}{42} x=\frac{5}{4} \\\\\\\frac{35}{42}x =\frac{5}{4} \\\\\\\frac{5}{6}x =\frac{5}{4} \\\\\\x=\frac{5}{4} :\frac{5}{6}\\\\\\x=\frac{5}{4} \cdot\frac{6}{5}\\\\\\x=\frac{6}{4} \\\\\\Otvet:x=1,5$