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kikabum1
@kikabum1
August 2022
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Решите систему уравнений:
4x+y=4
5y+2x=-7
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allegefickt
4x + y = 4
5y + 2x = -7
y = 4 - 4x
5(4 - 4x) + 2x = -7
20 - 20x + 2x = -7
18x = 27
x=
x=
x= 1,5
y = 4 - 4*1,5
y = 4 - 6
y = - 2
Проверяем:
4x + y = 4
4*1,5 - 2 = 4 - верно
1 votes
Thanks 3
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Answers & Comments
5y + 2x = -7
y = 4 - 4x
5(4 - 4x) + 2x = -7
20 - 20x + 2x = -7
18x = 27
x=
x=
x= 1,5
y = 4 - 4*1,5
y = 4 - 6
y = - 2
Проверяем:
4x + y = 4
4*1,5 - 2 = 4 - верно