Question

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

Answer 1

a) a= -11 , b+c =89  
c+a+b=a+b+c=-11+89=78

b)  a+b = -71 ,c+d =26
 (a+b)-(d+c)= (a+b)-(c+d)=-71-26=-97

c)  a+c = -7 , b+d = -35
 (a+b+c) + d=a+c+b+d=-7-35=-42