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Vivelarevolution
@Vivelarevolution
August 2022
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Решите пожалуйста 3-е или 4-тое издание (на выбор)
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AliceMagic
4) пусть х-тетрадь, у- блокнот, тогда по условию составим систему уравнений
2х+5у=41
2у+14=3х
1)2у+14=3х
у=(3х-14)/2
2)2х+5у=41
2х+5*[(3х-14)/2]=41
2х+2,5*(3х-14)=41
2х+7,5х-35=41
9,5х=76
х=8
3)2х+5у=41
2*8+5у=41
16+5у=41
5у=25
у=5
2 votes
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Answers & Comments
2х+5у=41
2у+14=3х
1)2у+14=3х
у=(3х-14)/2
2)2х+5у=41
2х+5*[(3х-14)/2]=41
2х+2,5*(3х-14)=41
2х+7,5х-35=41
9,5х=76
х=8
3)2х+5у=41
2*8+5у=41
16+5у=41
5у=25
у=5