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Fanatic22
@Fanatic22
July 2022
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ПОМОГИТЕ даю 30 баллов!!!!
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svetazuna
Verified answer
1416.
(13,4 - у) * 4,3 - 20,05 = 78,05 + 6,7у,
57,62 - 4,3у - 20,05 = 78,05 + 6,7у,
11у = -40,48,
у = -3,68,
(16,2 - х) * 3,2 - 50,08 = -8,12 - 5,1х,
51,84 - 3,2х - 50,08 = -8,12 - 5,1х,
1,9х = -9,88,
х = -5,2,
816.
70 кг карт. ---- 14 кг крахм., ?%,
(14 : 70) * 100% = 1/5 * 100% = 20%,
819.
222 1/25 : (131 - 128 2/5) + 46 1/2 : 3/10 = 238 2/5,
1) 131 - 128 2/5 = 130 5/5 - 128 2/5 = 2 3/5,
2) 222 1/25 : 2 3/5 = 5551/25 : 13/5 = 5551/25 * 5/13 = 427/5 = 85 2/5,
3) 46 1/2 : 3/10 = 93/2 * 10/3 = 5 * 31 = 155,
4) 85 2/5 + 155 = 240 2/5
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svetazuna
в 819 номере нужно изменить на:
svetazuna
3) 46 1/2 : 3/10 = 93/2 * 10/3 = 5 * 31 = 155,
svetazuna
4) 85 2/5 + 155 = 240 2/5
Fanatic22
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Answers & Comments
Verified answer
1416.(13,4 - у) * 4,3 - 20,05 = 78,05 + 6,7у,
57,62 - 4,3у - 20,05 = 78,05 + 6,7у,
11у = -40,48,
у = -3,68,
(16,2 - х) * 3,2 - 50,08 = -8,12 - 5,1х,
51,84 - 3,2х - 50,08 = -8,12 - 5,1х,
1,9х = -9,88,
х = -5,2,
816.
70 кг карт. ---- 14 кг крахм., ?%,
(14 : 70) * 100% = 1/5 * 100% = 20%,
819.
222 1/25 : (131 - 128 2/5) + 46 1/2 : 3/10 = 238 2/5,
1) 131 - 128 2/5 = 130 5/5 - 128 2/5 = 2 3/5,
2) 222 1/25 : 2 3/5 = 5551/25 : 13/5 = 5551/25 * 5/13 = 427/5 = 85 2/5,
3) 46 1/2 : 3/10 = 93/2 * 10/3 = 5 * 31 = 155,
4) 85 2/5 + 155 = 240 2/5