tony147
tony147
25-04-2017
Mathematics
contestada
twice the sum of a number and 9 is equal to 6
Respuesta :
irspow
irspow
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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