Question

памагите по математике быстрей​

Answer 1

Ответ:

(×-80):40=640

×-80=640•40

×-80=25600

×=25600+80

×=25680

(25680-80):40=640

640=640

(×-80)•40=640

×-80=640:40

×-80=16

×=80+16

×=96

(96-80)•40=640

640=640

×-80=640:40

×-80=16

×=16+80

×=96

96-80=640:40

16=16

×-80=640•40

×-80=25600

×=25600+80

×=25680

25680-80=640•40

25600=25600