Solve for x
x=5
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-200=-40x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
-40x=-200
Swap sides so that all variable terms are on the left hand side.
x=\frac{-200}{-40}
Divide both sides by -40.
x=5
Divide -200 by -40 to get 5.
Examples
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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