summerschoolsomebs summerschoolsomebs
  • 18-10-2017
  • Mathematics
contestada

The sum of three consecutive even integers is –78. What are the integers? Describe how you would use the strategy of writing an equation to solve the given problem.

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musiclover10045
musiclover10045 musiclover10045
  • 18-10-2017

3 even integers

 divide -78 by 3

-78 / 3 = -26


so -24 + -26 + -28  = -78

 equation would be:

 n + n+2 + n+4 = -78

3n +6 = -78

3n = -84

n = -84 / 3 = -28

n +2 = -28 +2 = -26

n+4 = -28 +4 = -24


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ejelonubenedict
ejelonubenedict ejelonubenedict
  • 18-10-2017
x, x+1 , x+2
x+x+1+x+2 = -78
3x+3=-78
3x=-78-3= -81
x=-81÷3 = -9

the integers are -9, -8, -7
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