Question

Срочно нужно решение по алгебре.С решением​

Answer 1

Ответ:

$\frac{1}{2} + \frac{1}{4} = \frac{2 + 1}{4} = \frac{3}{4}$

$2 \frac{1}{3} + 1 \frac{2}{9} = (2 + 1) + ( \frac{1}{3} + \frac{2}{9} ) = 3 + \frac{5}{9} = 3 \frac{5}{9}$

$7x = 49 \\ \frac{7x}{7} = \frac{49}{7} \\ x = 7$

$x {}^{2} + 3 = 67 \\ x {}^{2} = 67 - 3 \\ x {}^{2} = 64 \\ x = - 8 \\ x = 8$

$2 \frac{1}{8} - 1 \frac{1}{4} = \frac{17}{8} - \frac{5}{4} = \frac{7}{8}$