Answer:
I believe it's Multiplicative Property of Equality
Step-by-step explanation:
Since you reduce the numbers with the greatest common factor 2.
and you get ×5+1
And you reduce the numbers with the greatest common factor 5.
And you get the equality of 1=1
Hope this helps ʕ•ᴥ•ʔ
2*m+n-4
I'm not sure if this is correct
C