n+.5(n-1)=7

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Solution for n+.5(n-1)=7 equation: 



n+.5(n-1)=7

We move all terms to the left:

n+.5(n-1)-(7)=0

We multiply parentheses

n+0.5n-0.5-7=0

We add all the numbers together, and all the variables

1.5n-7.5=0

We move all terms containing n to the left, all other terms to the right

1.5n=7.5

n=7.5/1.5

n=5

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