-7у+2у-6+(15у-2 8*(2у-1)-3*(9у+5)-(у-8) 2/3*(4,5х-9/16у)-1,8*(5/9х+25/72у) Упростите

$-7y+2y-6+(15y-2)$ =

-5y-6+15y-2=10y-8" alt="-5y-6+15y-2=10y-8" align="absmiddle" class="latex-formula"> = $8*(1\frac{1}{4}y-1)$

$8*(2y-1)-3*(9y+5)-(y-8)$ = $16y-8-27y-15-y+8$ = $-11y-15-y$ = $-12y-15$ = $-3*(4y+5)$

$\frac{2}{3}*(4,5x-\frac{9}{16}y)-1,8*(\frac{5}{9}x+\frac{25}{72}y)$ = $\frac{2}{3}*4,5x-\frac{9}{16}y*\frac{2}{3}-1,8*\frac{5}{9}x-1,8*\frac{25}{72}y$ = $2*1,5x-\frac{3}{8}y-0,2*5x-\frac{18}{10}*\frac{25}{72}y$ = $3x-\frac{3}{8}y-x-\frac{5}{8}y$ = $3x-x-\frac{3}{8}y-\frac{5}{8}y$ = $2x-\frac{8}{8}y$ = $2x-1y$