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145455
@145455
July 2022
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решите систему уравнения
{х+2у = 4
{2х-у = -1
ПЖЖ !!!
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KittenMurMur
х + 2у = 42х - у = -1 (*2)х + 2у = 44х - 2у = -2х + 2у + 4х - 2у = 4-25х = 2х = 2 : 5х = 0,40,4 + 2у = 42у = 4 - 0,42у = 3,6у = 3,6 : 2у = 1,8Ответ: х = 0,4; у = 1,8
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