Question

pls ajutor matematică ​

Answer 1

Răspuns:

$1. \: \: 2x + 1 = 0 \\ \\ 2x = - 1 \\ \\ x = \frac{ - 1}{2} \\ \\ 2. \: \: 4x + 3 = 0 \\ \\ 4x = - 3 \\ \\ x = \frac{ - 3}{4}$

$\frac{2x}{3} + \frac{4}{5} = 0 \\ \\ \frac{2x}{3} = \frac{ - 4}{5} \\ \\ x = \frac{ - 4 \times 3}{2 \times 5} \\ \\ x = \frac{ - 6}{5}$

$\frac{5x}{7} + \frac{2}{3} = 0 \\ \\ \frac{5x}{7} = \frac{ - 2}{3} \\ \\ x = \frac{ - 2 \times 7}{3 \times 5} \\ \\ x = \frac{ - 14}{15}$

$4x - 1 = - 23 \\ 4x = - 23 + 1 \\ \\ 4x = - 22 \\ \\ x = - \frac{22}{4} \\ \\ x = - \frac{11}{2}$

$7x - 3 = 9 \\ \\ 7x = 3 + 9 \\ \\ 7x = 12 \\ \\ x = \frac{12}{7}$

$6x - 5 = 10 \\ \\ 6x = 15 \\ \\ x = \frac{15}{6} \\ \\ x = \frac{5}{3}$

$7x + 8 = - 2 \\ \\ 7x = - 2 - 8 \\ \\ 7x = - 10 \\ \\ x = \frac{ - 10}{7}$

Succes!