Solve for n -105/15=21/n

Math
-10515=21n
Rewrite the equation as 21n=-10515.
21n=-10515
Factor each term.
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Divide 105 by 15.
21n=-1⋅7
Multiply -1 by 7.
21n=-7
21n=-7
Solve for n.
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Multiply each term by n and simplify.
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Multiply each term in 21n=-7 by n.
21n⋅n=-7⋅n
Cancel the common factor of n.
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Cancel the common factor.
21n⋅n=-7⋅n
Rewrite the expression.
21=-7⋅n
21=-7n
21=-7n
Rewrite the equation as -7n=21.
-7n=21
Divide each term by -7 and simplify.
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Divide each term in -7n=21 by -7.
-7n-7=21-7
Cancel the common factor of -7.
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Cancel the common factor.
-7n-7=21-7
Divide n by 1.
n=21-7
n=21-7
Divide 21 by -7.
n=-3
n=-3
n=-3
Solve for n -105/15=21/n

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