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Mathematics
Gallegos
13 December, 21:45
Solve by using elimination 3x+y=27 - 3x+4y=-42
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Oscar Trujillo
14 December, 01:44
0
Hello:
3x+y=27 ... (1)
-3x+4y=-42 ... (2)
(1) + (2) : 5y = - 15
y = - 3
subsct in : (1) 3x - 3 = 27
3x = 30
x=10
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