rN= rL/3,4= 5100/3,4= 1500 (ribonu)
=> N=2. rN=2.1500=3000(Nu)
rA-rX=300
rU-rG=200
=>(rA-rX)+(rU-rG)=300+200
<=> (rA+rU)- (rX+rG)=500
<=> A-X= 500
Mà: A+X=0,5N=1500
Từ (1) và (2):
\(\left\{{}\begin{matrix}A-X=500\\A+X=1500\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}A=T=1000\\G=X=500\end{matrix}\right.\)