Ex 20 pls . Dau coroana

Ex 20 Pls Dau Coroana class=

Răspuns :

a+b=740
b+c=873 => b=873-c=873-1047+a=a-174
a+c=1047 => c=1047-a

a+b+b+c+a+c=740+873+1047
2(a+b+c)=2660
a+b+c=1330
a+a-174+1047-a=1330
a+873=1330
a=457
b=457-174=283
c=1047-457=590

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