Решите уравнения.
[tex][tex]2 \frac{1}{2}*( \frac{2}{15}-3 \frac{5}{6} )+ \frac{1}{4} (6 \frac{3}{8} -2 \frac{3}{4} )*(-4)+ \frac{7}{18} *9[/tex]

= 5/2 * (2/15-23/6)-(51/8-11/4)+7/2*1= 2,5 * (4/30-115/30)-(51/8-22/8)+3,5== 2,5 * (-111/30)-(29/8)+3,5= -111/12-29/8+3,5=-222/24-87/24+3,5==-309/24+3,5=-12,875+3,5=-9,375