schuellerq
schuellerq
13-09-2017
Mathematics
contestada
Is the equation 3+z= -9 true false or open
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DeathTheKid101
DeathTheKid101
13-09-2017
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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musiclover10045
musiclover10045
13-09-2017
3+z = -9 is open since you do not have a value for z
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