Question

Решите пожайлуста номер 185

Answer 1

А) 1/2*(х+4/5)-(1/5-х)
х/2+4/10-2/10+х
1,5х-2/10=0
15/10х=2/10
х=2/15

б) -2/3*(6/7-у)+(2/7+у)
-12/21+2/3у+2/7+у
-4/7+2/7+5/3у
5/3у=2/7
у=6/35

в) -(у+1/8)+3/4*(2+у)
-у-1/8+6/4+3/4у
-1/4у+11/8=0
1/4у=11/8
у=11/2

г) 1/9*(3/5-х)-(х-1/15)
3/45-1/9х-х+1/15
3/45-50/45х+3/45
50/45х=6/45
х=6/50=3/25

Answer 2

А)$\frac{1}{2}$ * (x+$\frac{4}{5}$)-($\frac{1}{5}$-x) =

= $\frac{x}{2}$ + $\frac{2}{5}$ - $\frac{1}{5}$ + x= 1.5x+0.2
 
Б)$- \frac{2}{3}$ * ($\frac{6}{7}$-y) +$\frac{2}{7}$ +y

= -$\frac{4}{7}$ + $\frac{2y}{3}$ +$\frac{2}{7}$ +y=

= $- \frac{2}{7}$+$1 \frac{2}{3}$y

В)-(y+ $\frac{1}8}$) + $\frac{3}{4}$ * (2+y) =-y - $\frac{1}{8}$+1.5 + $\frac{3y}{4}$ = $- \frac{y}{4}$+

+$1 \frac{5}{8}$

Г) $\frac{1}{9}$ * ( $\frac{3}{5}$ - x) - (x- $\frac{1}{15}$) = $\frac{1}{15}$ - $\frac{1}{9} x$-x + $\frac{1}{15}$=

= $\frac{2}{15}$ - $1\frac{1}{9} x$