Question

Suma a doua nr este 47,iar suma rasturnatelor lor este 173.Determinati cele doua nr .

Answer 1

RĂSPUNSURI cpw CEL MAI INTELIGENT RĂSPUNS! Cpw Geniu \frac{}{ab}+ \frac{}{cd} =47 \frac{}{ba} + \frac{}{dc} =173 deci 10a+b+10c+d=47 => 10(a+c)+(b+d)=47 => b+d=47- 10(a+c) 10b+a+10d+c=173 => (a+c)+10(b+d)=173 => a+c+10[47-10(a+c)]=173 a+c+470-100a-100c=173 297=99a+99c a+c=3, dar a,d≠0, deci a=1 si c=2 b+d=47-30=17 , deci b=8 si d=9 Verificare: 18+29=47 81+92=173!