(32-7n)+(64+17n)=19-(6n-13)
32-7n+64+17n=19-6n+13
17n-7n+6n=19+13-32-64
16n= -64
n=-64:16
n=- 4
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(32-7n) +(64+17n) = 19-(6n- 13)
96+10n=32-6n
10n+6n=32-96
16n=-64
n=-64/16
n=-4