kadinmorgan
06.12.2019 •
Mathematics
Asolution to 3x+4y=-5 and -5x+y=16 in ordered pair
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Ответ:
(x,y) = (-3, 1)
Step-by-step explanation:
q1 3x + 4y = -5
q2 -5x + y = 16
from q2 y = 16 + 5x
Put into q1
3x + 4 (16 + 5x) = -5
3x + 64 + 20x = -5
3x + 20 x + 64 = -5
23x = -5 -64
23x = -69
x = -69/23
x = -3
y = 16 + 5(-3)
y = 16 - 15
y = 1
(x,y) = (-3, 1)
Ответ: