Question

ABOBA помогите пж пж ​

Answer 1

$\displaystyle \frac{3}{4}+2\frac{1}{4}-3\frac{1}{7}=\frac{3}{4}+\frac{9}{4}-\frac{22}{7}=\frac{12}{4}-\frac{22}{7}=\frac{3}{1}-\frac{22}{7}=\\\\\\=\frac{3*7}{1*7}-\frac{22}{7}=\frac{21}{7}-\frac{22}{7}=-\frac{1}{7}$