Matrices question

[Cody kong]

The answer is the second photo.
I don’t know how to solve x, can anyone please help me

 

[Dr.Peterson]

The answer is the second photo.
I don’t know how to solve x, can anyone please help me

You want to isolate X. How can you get rid of the F on the left-hand side? Do that, and then repeat the same sort of thinking.

Please show us some sort of thinking, so we can see what you DO know.