Respuesta :

Brainiac842

2n-2n+4n=20

combine like terms→4n=20

divide both sides by 4→4n/4=20/4

n=5
First we must figure out 2n-2n. This will equal 0n, or 0. Then, this means that 4n is equal to 20. As follows,

4×5=20
n=5