tony147 tony147

25-04-2017
Mathematics

contestada

twice the sum of a number and 9 is equal to 6

Respuesta :

25-04-2017

2(n+9)=6 divide both sides by 2

n+9=3 subtract 9 from both sides

n=-6

check

2(-6+9)=6

2(3)=6

6=6

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