Question

У\2-у\8=у\4-1 зарание спасибо

Answer 1

$\frac{y}{2} - \frac{y}{8} = \frac{y}{4} - 1 \\ \frac{4y-y}{8} = \frac{y}{4} -1 \\ \frac{3y}{8} = \frac{y}{4} -1 \\ \frac{3y}{8} - \frac{y}{4} =-1 \\ \frac{3y-2y}{8} =-1 \\ \frac{y}{8} =-1 \\ y=-1*8 \\ y=-8$