1.-Consider the system of equations

$\displaystyle x1 - x2 + 2x3 = 1$

$\displaystyle 2x1 + 2x3 = 1$

$\displaystyle x1 - 3x2 + 4x3 = 2.$

Does this system have a solution? If so, describe explicitly all solutions.

2.-Give an example of a system of two linear equations in two unknowns whichThanks so much for your help

has no solution.