summerschoolsomebs summerschoolsomebs

18-10-2017
Mathematics

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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

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

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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