Q$2-$ For The fourth onderr linEar system bel

$(5$ Points$)$

$7x+4y+3zf2w=4$

$6w-y+,4w=2$

$3x+z,-6$

$x,+7w=15$

A$)$ Solve foe $x$ and $y$ only using the dererminant method

$(6)$ Use the invetre method to make sure your solution is correct. $[$your may use: 'inv', 'det'$]$