Question

1/2(6а-2)-1/15(5b+2)=1/2*6*1 1/6-2-1/15*5*2/5+2
Помагите пж с действиями ​

Answer 1

$\frac{1}{2} * 6a = 3a$

$\frac{1}{2} * -2 = -1$

$-\frac{1}{15} * 5b = -\frac{1}{3} b$

$-\frac{1}{15} * 2 = -\frac{2}{15}$

$3a - 1 -\frac{1}{3}b -\frac{2}{15} = \frac{1}{2} * 6 * \frac{7}{6} - 2 -\frac{1}{15} * 5 * \frac{2}{5} + 2$

$\frac{1}{2} * 6 * \frac{7}{6} = \frac{7}{2}$

$-\frac{1}{15} * 5 * \frac{2}{5} = -\frac{2}{15}$

$\frac{7}{2} -\frac{2}{15} = \frac{7}{30} - \frac{4}{30} = \frac{3}{30} = \frac{1}{10} = 0.1$

$3a - 1 - \frac{1}{3} b = 0.1$

$3a - \frac{1}{3} b = 1.1$