Yes an No. You can have blood type AB in following situations: AO+ BO AA+BB AB+AB So there's more possible ways to get type AB other than the combination of ABs.
Not sure what you are asking, clearly 6x is 3x plus 3x.
But the question asks "what is 3x equals 3x?"
"3x equals 3x" is a tautology.
(A logical tautology is a statement that is true regardless of...