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13.07.2019 •
Mathematics
5x + 2y = 6 3x + y = 4 which of the following is part of the solution to the system of equations? 1)x = -2 2)y = -23)x = 1
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Ответ:
3x + y = 4multiply by -2
5x + 2y = 6
-6x - 2y = -8 (result of multiplying by -2)
add
-x = -2
x = 2
5x + 2y = 6
5(2) + 2y = 6
10 + 2y = 6
2y = 6 - 10
2y = -4
y = -4/2
y = -2 <=== here it is
Ответ:
Step-by-step explanation:7/10 is the answer