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12-11-2020
Mathematics

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How many solutions does this equation have? –7z − 7 = –4z + 8

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mayie07 mayie07

12-11-2020

-7z - 7 = -4z + 8
-7z + 4z = 8 + 7
-3z = 15
-z = -5
z = 5

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