Ответы на вопрос:
Пошаговое объяснение:
( 400 :X + 5 ) - 5 = 200
400 : x + 5 = 200+5
400:x + 5 = 205
400 : x = 205 - 5
400 : x = 200
x = 400 : 200
x = 2
1000 - ( 4500 :X + 80 ) = 420
4500:x + 80 = 1000-420
4500:x + 80 = 580
4500:x = 580 - 80
4500:x = 500
x = 4500:500
x = 9
(54 :X + 30 ) x 2 = 72
54:x + 30 = 72:2
54:x + 30 = 36
54:x = 36 - 30
54:x = 6
x = 54 : 6
x = 9
8 * ( 36 + 4*X) = 480
36 + 4x = 480:8
36 + 4x = 60
4x = 60 - 36
4x = 24
x = 24 : 4
x = 6
(6*X + 12 ) : 6 = 50
6x + 12 = 50 * 6
6x + 12 = 300
6x = 300 - 12
6x = 288
x = 288 : 6
x = 48
3(2у-1)+6(3у-4)=83+5(у-3) 6у-3+18у-24=83+5у-15 24у-27=5у+68 24у-5у=68+27 19у=95 у=95: 19 у=5 ответ: у=5.
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