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5n+7=81

We move all terms to the left:

5n+7-(81)=0

We add all the numbers together, and all the variables

5n-74=0

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

5n=74

n=74/5

n=14+4/5

| (p+3)(p+10)=0 | | 15x+12+3x(2x-6)=3x-(21x-1)+2 | | X-50+x+x-70=180 | | X²-7x=20 | | 2.14x-12.18=-576 | | e/3?=7 | | e/?3=7 | | Z+37=z+z-38 | | 2=u3?6 | | 2=u3? 6 | | 8^-2-x=168 | | 75=3j+18 | | 8x+7.5=119.5 | | 7h-h=42 | | 12z+34=4z-38 | | 82?r=28 | | k/9=6? | | 2=51?b | | 6=k/9? | | 25=51?b | | 11+6g=53 | | d3?4=3 | | x/4-12=-18 | | d3? 4=3 | | 18+2h=68 | | 10+7v=59 | | 7(2x-5)=-21 | | 4x-32,8=65,4 | | 7(2x-5=-21 | | 12000(1+.0625x)=18000 | | 4x-8+3x=7x+20 | | n=1.00n=1.34 |

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