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18-02-2021
Mathematics

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4x-5y=18 determine the missing coordinate in the ordered pair (-2,?) so that it will satisfy the given equation

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kitckat kitckat

18-02-2021

?= -5.2

Because plug in numbers
(x,y)
4(-2) - 5y = 18
Pemdas
-8 -5y = 18
Add 8 to both sides
-5y = 26
Divide -5 both sides
y = -5.2

Check:
4(-2) -5(-5.2) = 18
Pemdas
-8 -5(-5.2) = 18
Pemdas, two negatives make a positive
-8 +26 = 18
18 = 18

Perhaps

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