Respuesta :

irspow
2n+9+5n=30  combine like terms on left side

7n+9=30  subtract 9 from both sides

7n=21  divide both sides by 7

n=3
Zipper
n = 3

add like terms: 7n + 9 = 30
subtract 9 from both sides: 7n = 21
divide 7 from both sides
n = 3