Question

947-13xb+43=639 ajutorrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

Answer 1

Salutare!:)

$947 - 13 \times b + 43 = 639 \\ 947 - 13 \times b = 639 - 43 \\ 947 - 13 \times b = 596 \\ 13 \times b = 947 - 596 \\ 13 \times b = 351 \\ b = 351 \div 13 \\ b = 27$

Succes!

Answer 2

27

Explicație pas cu pas:

947-13xb+43=639

947-13×b=639-43

947-13×b=596

13×b=947-596

13×b=351

b=351:13

b=27

Verific:

947-13×27+43=

947-351+43=

596+43=

639✔