Question

Urgent vă rog dau coroană​

Answer 1

Răspuns:

Salutare!

a) (a•3)+3=30

a•3=30-3

a•3=27

==> a=27/3 <==> a=9

b) (b+3)•3=30

b+3=30:3

b+3=10

b=10-3

==> b=7

c) [(c-3):3]+3=30

(c-3):3=30-3

(c-3):3=27

c-3=27•3

c-3= 81

c=81+3

==> c=84