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2*n+15=5*n
We move all terms to the left:
2*n+15-(5*n)=0
We add all the numbers together, and all the variables
2*n-(+5n)+15=0
We add all the numbers together, and all the variables
2n-(+5n)+15=0
We get rid of parentheses
2n-5n+15=0
We add all the numbers together, and all the variables
-3n+15=0
We move all terms containing n to the left, all other terms to the right
-3n=-15
n=-15/-3
n=+5
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