Solve for n
n=-3
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6\times 2=15+n
Multiply both sides by 2.
12=15+n
Multiply 6 and 2 to get 12.
15+n=12
Swap sides so that all variable terms are on the left hand side.
n=12-15
Subtract 15 from both sides.
n=-3
Subtract 15 from 12 to get -3.
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