Question

a+b+c=d
d=100
b=69
c=32
a=?​

Answer 1

Răspuns:

a+b+c=d

d=100

b=69

c=32

a+69+32=100

a+101=100

a=100-101

a= -1

Answer 2

$\it b=69;\ \ c=32;\ \ d=100.\\ \\ a+b+c=d \Rightarrow a+69+32=100 \Rightarrow a+101=100|_{-101} \Rightarrow a=-1$