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21-10-2017
Mathematics

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Determine whether (7,9) is a solution of 7x+2y= −7.

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texaschic101 texaschic101

21-10-2017

we can check by subbing in the values.

7x + 2y = -7
(7,9).....x = 7 and y = 9
now we sub
7(7) + 2(9) = -7
49 + 18 = -7
67 = -7 (incorrect)....therefore, (7,9) is NOT a solution for this equation

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