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Daca a+b = 27, c = -59 , calculati c+ (a+b)
Daca a = -11 , b+c = 89 , calculati c+a+b
Daca a+b=-71, c+d=+26, calculati ( a+b) + (d+c)
Daca a +c = -7 , b +d = - 35 , calculati ( a +b+c ) +d

Răspuns :

Alexandravert
c+(a+b)=-59+27=-32
c+a+b=89+(-11)=89-11=78
(a+b)+(d+c)=-71+(-26)= -71-26=-97
(a+b+c)+d=-7+(-35=-7-35=-42

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