Решите уравнение х-1/2=3/4х; 1 4/5у=у+4; 3/4у-2/3=7/12у;

1) [latex]x- \frac{1}{2}= \frac{3}{4}x [/latex] [latex]x- \frac{3}{4}x= \frac{1}{2} [/latex] [latex] \frac{1}{4}x= \frac{1}{2} [/latex] [latex]x= \frac{1*4}{2*1} [/latex] [latex]x=2[/latex] 2) [latex] \frac{4}{5}y=y+4 [/latex] [latex] \frac{4}{5}y-y=4 [/latex] [latex] -\frac{1}{5}y=4 [/latex] [latex]y= \frac{4*(-5)}{1} [/latex] [latex]y=-20[/latex] 3) [latex] \frac{3}{4}y - \frac{2}{3}= \frac{7}{12}y [/latex] [latex] \frac{3}{4}y- \frac{7}{12}y= \frac{2}{3} [/latex] [latex] \frac{9-7}{12}y= \frac{2}{3} [/latex] [latex] \frac{2}{12}y= \frac{2}{3} [/latex] [latex]y= \frac{2*12}{3*2}[/latex] [latex]y=4[/latex]