Task 1. For which values of the variables $x$ and $y$, the difference between the expressions $\frac{2 x+15}{8}$ and $1 \frac{1}{3} \cdot(y-1)$ will be 3 times smaller than the expression $2 \cdot(5-2 y)$, and the expression $\frac{x+5 \frac{3}{4}}{2}$ will be 0.125 greater than $3 y?$