Solve for x
x=\frac{2}{5}=0.4
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x^{-1}=\frac{5}{2}
Divide both sides by 2.
\frac{1}{x}=\frac{5}{2}
Reorder the terms.
2=5x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 2x, the least common multiple of x,2.
5x=2
Swap sides so that all variable terms are on the left hand side.
x=\frac{2}{5}
Divide both sides by 5.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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