2 Answers

RRZ Europe · Answer 1 · 2018-08-30T10:44:03+0000

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

Pme · Answer 2 · 2018-09-01T14:57:37+0000

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

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