Question

tìm x: |x+4/15|-|-3,75|=-|-2,15|

Answer 1

Ta có: \(\left|x+\frac{4}{15}\right|-\left|-3,75\right|=-\left|-2,15\right|\)

=>\(\left|x+\frac{4}{15}\right|=-2,15+3,75=1,6=\frac85\)

=>\(\left[\begin{array}{l}x+\frac{4}{15}=\frac85\\ x+\frac{4}{15}=-\frac85\end{array}\right.\Rightarrow\left[\begin{array}{l}x=\frac85-\frac{4}{15}=\frac{24-4}{15}=\frac{20}{15}=\frac43\\ x=-\frac85-\frac{4}{15}=-\frac{24}{15}-\frac{4}{15}=-\frac{29}{15}\end{array}\right.\)