Question

va rog cat mai repede.dar punctele (c).dau coroana​

Answer 1

Răspuns:

$c) \: \: x - \frac{3}{7} = - \frac{5}{21}$

$x = - \frac{5}{21} + \frac{3}{7} = > x = \frac{4}{21}$

$c) \: - \frac{9}{44}x = 2 \frac{5}{11}$

$x = - \frac{9}{44}x = \frac{27}{11} = > x = - 12$

$c) \: \: \: x \div ( - 2 \frac{2}{3} ) = 3 \frac{1}{8}$

$x \div ( - \frac{8}{3} ) = \frac{25}{8}$

$- x \times \frac{3}{8} = \frac{25}{8}$

$- \frac{3}{8}x = \frac{25}{8} = > x = - \frac{25}{3}$

$c) \: \: \frac{5}{16} \div x = - \frac{3}{4}$

$\frac{5}{6} \div x = - \frac{3}{4} . \: x \: diferit \: de \: 0 \:$

$\frac{5}{16} \times \frac{1}{ \times } = - \frac{3}{4}$

$\frac{5}{16x} = - \frac{3}{4}$

$20 = - 48x$

$- 48x = 20$

$x = - \frac{5}{12} . \: \: x \: diferit \: de \: 0$

$x = - \frac{5}{12}$

Explicație pas cu pas:

x diferit de 0 înseamnă x egal tăiat 0, asa se scrie