Homework Help Forum: 8th grade

Posted by Olivia on Monday, October 19, 2009 at 7:07pm.

I need help on this equation: -5(-3n+4)-12=13

• 8th grade - Ms. Sue, Monday, October 19, 2009 at 7:10pm

  -5(-3n+4)-12=13 15n - 20 - 12 = 13 15n - 32 = 13 15n = 13 + 32 15n = 45 n = ?

  
  

• 8th grade - jim, Monday, October 19, 2009 at 7:11pm

  -5(-3n+4)-12=13 Add 12 to both sides: -5(-3n+4)=25 Divide across by 5: 3n - 4 = 5 Add 4 to both sides: (you fill this in) Finally, divide across by 3: (you fill this in too!)

  
  

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