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12n-2\left(3\times 6+5\right)=1\times 12+5
Multiply both sides of the equation by 12, the least common multiple of 6,12.
12n-2\left(18+5\right)=1\times 12+5
Multiply 3 and 6 to get 18.
12n-2\times 23=1\times 12+5
Add 18 and 5 to get 23.
12n-46=1\times 12+5
Multiply -2 and 23 to get -46.
12n-46=12+5
Multiply 1 and 12 to get 12.
12n-46=17
Add 12 and 5 to get 17.
12n=17+46
Add 46 to both sides.
12n=63
Add 17 and 46 to get 63.
n=\frac{63}{12}
Divide both sides by 12.
n=\frac{21}{4}
Reduce the fraction \frac{63}{12} to lowest terms by extracting and canceling out 3.