schuellerq
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 musiclover10045
  • 13-09-2017
3+z = -9 is open since you do not have a value for z
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