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alasia559
30.06.2019 •
Mathematics
Which ordered pair is a solution to the linear inequality below? 3x-5y≥10 a. (1,4) b. (6,-3) c. (-5,-2) d. (2,0)
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Ответ:
Ответ:
Step-by-step explanation:
-3x - 3y = -30
-2x + 7y = -2
-3x - 3y = -30 /*(-2)
-2x + 7y = -2 /*3
6x + 6y = 60
-6x + 21y = -6
6x - 6x + 6y + 21y = 60 - 6
27y = 54
y = 2
-3x - 3y = -30
-3x - 3*2 = -30
-3x - 6 = -30
-3x = -30 + 6
-3x = - 24 / : (-3)
x = 8