Răspuns:
[tex]c) \: \: x - \frac{3}{7} = - \frac{5}{21} [/tex]
[tex]x = - \frac{5}{21} + \frac{3}{7} = > x = \frac{4}{21} [/tex]
[tex]c) \: - \frac{9}{44}x = 2 \frac{5}{11} [/tex]
[tex]x = - \frac{9}{44}x = \frac{27}{11} = > x = - 12[/tex]
[tex]c) \: \: \: x \div ( - 2 \frac{2}{3} ) = 3 \frac{1}{8} [/tex]
[tex]x \div ( - \frac{8}{3} ) = \frac{25}{8} [/tex]
[tex] - x \times \frac{3}{8} = \frac{25}{8} [/tex]
[tex] - \frac{3}{8}x = \frac{25}{8} = > x = - \frac{25}{3} [/tex]
[tex]c) \: \: \frac{5}{16} \div x = - \frac{3}{4} [/tex]
[tex] \frac{5}{6} \div x = - \frac{3}{4} . \: x \: diferit \: de \: 0 \: [/tex]
[tex] \frac{5}{16} \times \frac{1}{ \times } = - \frac{3}{4} [/tex]
[tex] \frac{5}{16x} = - \frac{3}{4} [/tex]
[tex]20 = - 48x[/tex]
[tex] - 48x = 20[/tex]
[tex]x = - \frac{5}{12} . \: \: x \: diferit \: de \: 0[/tex]
[tex]x = - \frac{5}{12} [/tex]
Explicație pas cu pas:
x diferit de 0 înseamnă x egal tăiat 0, asa se scrie
