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A.➕b=1031
B➕c=433
A➕c=1401
Calculatı: 2a➕2b➕2c=?


Răspuns :

2a+2b+2c=1031+433+1401
2a+2b+2c=1464+1401
2a+2b+2c=2865
a+b= 1.031
b+c= 433
a+c= 1.401
~
2a+2b+2c= ?
~
a+b+b+c+a+c= 1.031+433+1.401
2a+2b+2c= 2.865

/robèrtinni