Question

50 points solve simple question...

Answer 1

we have known that L. H. S=R.H.S
2x-y=6
from the question y=-2
2x-(-2)=6
2x+4=6
2x=2
Here is the solution x=1

Answer 2

Answer:

$\boxed{\sf{x=2}}$

Step-by-step explanation:

$\left[\begin{array}{ccc}2x-y&5\\3&y\\\end{array}\right] =\left[\begin{array}{ccc}6&5\\3&-2\\\end{array}\right] \\\\\textsf{Comparing the matrices we have : }$

$y = -2\\\\2x-y=6$

$\textsf{So:}\\2x-(-2)=6\\=>2x+2=6\\=>2x=6-2\\=>2x=4\\=>x=\frac{4}{2}\\=>x=2$