13. Answer n=7/12
subtract 1/4 on both sides n+1/4-1/4=5/6-1/4
14. Answer x=4 5/18
simplify 11/18=x+-11/3
flip equation x+-11/3=11/18
add 11/3 to both sides x+-11/3+11/3=11/18+11/3
x=77/18
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