Question 180171
n+g=71
4n=g-6

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n=71-g
4(71-g)=g-6
284-4g=g-6
290-4g=g
290=5g
g=58

then 
4n=g-6
4n=58-6
4n=52
n=13

check:
g+n=58+13=71
4(13)=52  and g-6=58-6=52...right