Relax

Respuesta :

=450+488-251
=938-251
=687

(5 x 90) + (8 x 61) - 251

50 x 90 = 450

450 + (8 x 61) - 251

8 x 61 = 488

450 + 488 - 251

450 + 488 = 938

938 - 251 = 4687

Answer: 687

Hope this Helps!!