For problems B$.$I through B$\mathrm{.}8,$ find the solution of the given system of equations using Canssiai Gauss$-$Jondan elimination, if a solutice exists. Also, classify the system as "inconsistent", "consistent with a unique solution", or "censistent with an infinite number of solutions".

Problem B$\mathrm{.}1$

$20y1=10x$

$2x5y-2=0$

Froblem B$.2$

$1\mathrm{.}5x1\mathrm{.}5y=-12-1\mathrm{.}5z$

$-2-y=-3x-2x$