Question

(31*550-x)*120=10200

Answer 1

х=2115, если что, обращайся... ОБЪЯСНЮ!

Answer 2

( 31 *550 - х) *120 =10 200

17 050 -х =10 200 : 120

17 050 - х =85

х =17 050 - 85

х = 16 965

проверка:

( 31 *550 - 16 965 )*120 =10 200

 

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