Respuesta :

springtrap7772

Answer:

n=-3

Step-by-step explanation:

add the like values and add the 6 to the -12 and decide the totals to get -3

blackbird1309

Answer:

n=3

Step-by-step explanation:

2n+3n-6=-21

Add 6 on both sides of the equal sign: -6+6=-21+6

2n+3n=15

Combine like terms: 2n+3n

5n=15

Divide by 5 on both sides of the equal sign: 5n/5=15/5

n=3