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in algebra, if what you do to one side of the equation you do to the other side you do not change things and you can solve for the unknown

2n-5 = 7

add 5 to BOTH sides

2n-5 + 5 = 7 + 5

2n = 12

Divide BOTH sides by 2

n = 6

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Q: What is the answer to this problem 2n-5 equals 7?
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