Решите пожайлуста номер 185

А)[latex] \frac{1}{2} [/latex] * (x+[latex] \frac{4}{5} [/latex])-([latex] \frac{1}{5} [/latex]-x) = = [latex] \frac{x}{2} [/latex] + [latex] \frac{2}{5} [/latex] - [latex] \frac{1}{5} [/latex] + x= 1.5x+0.2   Б)[latex]- \frac{2}{3} [/latex] * ([latex] \frac{6}{7} [/latex]-y) +[latex] \frac{2}{7} [/latex] +y = -[latex] \frac{4}{7} [/latex] + [latex] \frac{2y}{3} [/latex] +[latex] \frac{2}{7} [/latex] +y= = [latex]- \frac{2}{7} [/latex]+[latex]1 \frac{2}{3} [/latex]y В)-(y+ [latex] \frac{1}8} [/latex]) + [latex] \frac{3}{4} [/latex] * (2+y) =-y - [latex] \frac{1}{8} [/latex]+1.5 + [latex] \frac{3y}{4} [/latex] = [latex]- \frac{y}{4} [/latex]+ +[latex]1 \frac{5}{8} [/latex] Г) [latex] \frac{1}{9} [/latex] * ( [latex] \frac{3}{5} [/latex] - x) - (x- [latex] \frac{1}{15} [/latex]) = [latex] \frac{1}{15} [/latex] - [latex] \frac{1}{9} x[/latex]-x + [latex] \frac{1}{15} [/latex]= = [latex] \frac{2}{15} [/latex] - [latex] 1\frac{1}{9} x[/latex]

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