Solve for x
x=-9
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81=-9x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
-9x=81
Swap sides so that all variable terms are on the left hand side.
x=\frac{81}{-9}
Divide both sides by -9.
x=-9
Divide 81 by -9 to get -9.
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