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Mathematics
Ivy Rhodes
11 February, 19:56
Is the equation 3+z = - 9 true false or open
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Ingrid Alvarado
11 February, 20:54
0
Subtract 3 from both sides
(z = - 9 - 3)
Simplify - 9 - 3 to - 12
z = - 12
3 + - 12 = - 9 so this is true.
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Darren Gallegos
11 February, 21:43
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3+z = - 9 is open since you do not have a value for z
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