Question

СРОЧНО ДАЮ 40 БАЛОВ!!! ​

Answer 1

$\frac{x}{3} + \frac{x - 2}{5} = \frac{5x + 3(x - 2)}{15} = \frac{5x + 3x - 6}{15} = \frac{8x - 6}{15}$

$\frac{3a + 1}{7a} - \frac{7a + b}{14ab} - \frac{b - 1}{2b} = \frac{2b(3a + 1) - 7a - b - 7a(b - 1)}{14ab} = \frac{6ab + 2b - 7a - b - 7ab + 7a}{14ab} = \frac{b - ab}{14ab}$

$\frac{1}{ {a}^{2} } + \frac{a - 2}{a} = \frac{1 + a(a - 2)}{ {a}^{2} } = \frac{1 + {a}^{2} - 2a }{ {a}^{2} } = \frac{ {(a - 1)}^{2} }{ {a}^{2} }$