How do you solve 3/4n -18 = 1/4n -4

asked Dec 13, 2015 141k views

3 votes

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1) Multiply both sides by 4: 3n - 72 = n - 16
2) Subtract n from both sides: 2n - 72 = -16
3) Add 72 to both sides: 2n = 56
n = 28.

Mykel answered Dec 15, 2015

by Mykel

8.2k points

3 votes

$(3)/(4n)-18^((4n)=(1)/(4n)-4^((4n)\\\\ 3-72n=1-16n\\\\ -72n+16n=1-3\\\\ -56n=-2 \\\\ \boxed{n=(-2)/(-56)=(1)/(28)}$

Sunghoon answered Dec 20, 2015

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