alirod27 alirod27

27-01-2015
Mathematics

Answered

what's 3/4n-18=1/4n-4

Answer :

27-01-2015

[tex]\frac{3}{4}n-18=\frac{1}{4}n-4\ \ \ \ | multiply\ by\ 4\\\\ 3n-72=n-16\ \ \ | subtract\ n\\\\ 2n-72=-16\ \ \ | add\ 72\\\\ 2n=56\ \ \ | divide\ by\ 2\\\\ n=28[/tex]

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