32+(75-n)=47 82-(n-54)=37 843-(319+n)=470
32+(75-n)=47 32+75-n=47 107-n=47 n=60 82-(n-54)=37 82-n+54=37 136-n=37 n=99 843-(319+n)=470 843-319-n=470 524-n=470 n=54