5 = 2n - 6
Five "is" or equals. Six less than Daijh would be Daijh - 6. Two times Diajh would be 2 Diajhes (in algebra that would be "2Diajh). Six less than that would be 2Diajh - 6.
Minus 6 what? Just six. 2Diajh -6Diajh = -4Diajh, which is of course physically impossible but not mathematically, but 2 times anything minus six doesn't combine.
For example, 2 less than 5 is 3, but 2 less than 5 times 7 is not 3, right?
Go!