Question

-6x при х -2 1/12
3 - 1,5x при х = -2/5
И 5 на фото

Answer 1

$\displaystyle\bf\\1)\\\\x=-2\frac{1}{12}\\\\\\-6x=-6\cdot\Big(-2\frac{1}{12} \Big)=6\cdot \frac{25}{12} =\frac{25}{2} =12,5\\\\\\2)\\\\x=-\frac{2}{5} \\\\\\3-1,5x=3-1,5\cdot\Big(-\frac{2}{5} \Big)=3+1,5\cdot\frac{2}{5} =3+0,3\cdot 2=3+0,6=3,6\\\\\\5)\\\\x=0,5 \ \ ;\ \ y=-2\\\\\\\frac{y+4x}{x-2y} =\frac{-2+4\cdot 0,5}{0,5-2\cdot(-2)} =\frac{-2+2}{0,5+4} =\frac{0}{4,5} =0$