ответ: а) а * 948 - 6 390 = 429 690
а * 948 = 429 690 + 6 390
а * 948 = 436 080
а = 436 080 : 948
а = 460
460 * 948 - 6 390 = 429 690
436 080 - 6 390 = 429 690
429 690 = 429 690
б) 273 996 : b + 15 764 = 16 151
273 996 : b = 16 151 - 15 764
273 996 : b = 387
b = 273 996 : 387
b = 708
273 996 : 708 = 16 151 - 15 764
387 = 387
в) (50 - х) : 7 + 195 = 40 * 5
(50 - х) : 7 + 195 = 40 * 5
(50 - х) : 7 + 195 = 200
(50 - х) : 7 = 200 - 195
(50 - х) : 7 = 5
50 - х = 5 * 7
50 - х = 35
х = 50 - 35
х = 15
(50 - 15) : 7 + 195 = 40 * 5
35 : 7 + 195 = 200
5 + 195 = 200
200 = 200
г) (270 : у - 2) * 30 = 7 *120
(270 : у - 2) * 30 = 840
270 : у - 2 = 840 : 30
270 : у - 2 = 28
270 : у = 28 + 2
270 : у = 30
у = 270 : 30
у = 9
(270 : 9 - 2) * 30 = 7 * 120
(30 - 2) * 30 = 840
28 * 30 = 840
840 = 840
Пошаговое объяснение:
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