\(1-\left(\frac{27}{8}+a-\frac{129}{24}\right):\frac{23}{3}=0\)
\(1-\left(\frac{81+24a-129}{24}\right):\frac{23}{3}\)=0
\(1-\left(\frac{24a-48}{24}\right):\frac{23}{3}=0\)
\(1-\left(a-2\right)\frac{3}{23}=0\\ \frac{23}{23}-\frac{3a-6}{23}=0\\ \frac{23-3a+6}{23}=0\\ 29-3a=0\\ a=\frac{29}{3}\)
\(\frac{3}{4}-\left[2a+1\right]=\frac{1}{4}\\ \left[2a+1\right]=\frac{1}{2}\\ =>\orbr{\begin{cases}2a+1=\frac{1}{2}\\2a+1=-\frac{1}{2}\end{cases}}\)
còn lại bạn tự giải nhé mk lười lắm