Question

помогите пожалуйста онлайн мектеп по математике ​

Answer 1

$\displaystyle \frac{1}{15}-\frac{4}{1,5x+1}=-\frac{1}{3},x\neq -\frac{2}{3}\\\\ \frac{1}{15}-\frac{4}{\frac{3}{2}x+1 }=-\frac{1}{3}\\\\ \frac{1}{15}-\frac{4}{\frac{3x+2}{2} }=-\frac{1}{3}\\\\ \frac{1}{15}-\frac{8}{3x+2}=-\frac{1}{3}\\\\ -\frac{8}{3x+2}=-\frac{1}{3}-\frac{1}{15}\\\\ -\frac{8}{3x+2}=-\frac{2}{5}\\\\ \frac{8}{3x+2}=\frac{2}{5}\\\\ 40=2(3x+2)\\20=3x+2\\-3x=2-20\\-3x=-18\\x=6$