Respuesta :

kphung76127
n+2(2n-5)=20

Distribute
n+4n-10=20

Combine like terms
5n-10=20

Add 10 to both sides
5n=30

Divide both sides by 5
n=6

Final answer: 6
n+2n-5+2n-5=20

that is all sides with given values.

combine like terms

5n-10=20

inverse operation
5n-10=20
    +10  +10
_____________
5n =30
divide by 5
n=6