(12000+v)+38600=100000

Question

(12000+v)+38600=100000

Answer 1

12000+v=100000-38600
12000+v=61400
v=61400-12000
v=49400

Answer 2

(12000+v)+38600=100000
v=12000+38600
v=50600
v=100000-50600
v=49400
Проверка:
(12000+49400)+38600=100000
100000=100000