Tìm hai số tự nhiên a và b (a>b) biết rằng số a+b=170 và ƯCLN (a;b)=45
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a) goi hai so la a ; b va a >b
vi UCLN(a,b)=18=>a=18k ; b=18q (trong do UCLN (k,q)=1 va k>q)
=>a+b=162
18k+18q =162
18(k+q)=162
k+q=9
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