Yes your work is correct. Good job.Now I obtain the answer
View attachment 17279
Checking my work though:
1(3) - 2(1) = 1
2(3) - 1(1) = 5
Is this correct?
You need to check both equations.I'm not sure. Is the requirement of my check to equal 1, if so then my work is incorrect and if this check (obtaining 5) is fine then my work is correct