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Mathematics, 10.02.2021 21:00, 128585
When solving the system of equations, which expression could be substituted for x in the second equation?
X + 2y =15
5x + y = 21
![answer](/tpl/images/cats/otvet.png)
Answers: 3
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When solving the system of equations, which expression could be substituted for x in the second equa...
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