Solve for n
n=21
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3\times 9=6+n
Multiply both sides by 9.
27=6+n
Multiply 3 and 9 to get 27.
6+n=27
Swap sides so that all variable terms are on the left hand side.
n=27-6
Subtract 6 from both sides.
n=21
Subtract 6 from 27 to get 21.
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