Fill in the other coordinate for the line 7x - 5y = 21: (4, )

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asked Apr 28, 2017 153k views

1 Answer

Imkingdavid · Answer 1 · 2017-05-03T17:56:08+0000

7x - 5y = 21....(4,?)...so sub in 4 for x and solve for y
7(4) - 5y = 21
28 - 5y = 21
-5y = 21 - 28
-5y = - 7
y = 7/5

check..
7(4) - 5(7/5) = 21
28 - 35/5 = 21
28 - 7 = 21
21 = 21 (correct)

the other coordinate is 7/5......(4,7/5)

Fill in the other coordinate for the line 7x - 5y = 21: (4, )

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