alysia09 alysia09

04-06-2018
Mathematics

contestada

Six times the sum of a number and twelve is forty

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mkryukova19 mkryukova19

04-06-2018

n is a number
"the sum of a number and twelve" is (n+12)
"Six times the sum of a number " is 6(n+12)

6(n+12)=40
6n+72=40
6n=40-72
6n= - 32
n=-32/6 = -16/3 or -5 1/3

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