Solve for x
x = -\frac{16}{13} = -1\frac{3}{13} \approx -1.230769231
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4-13x-20=0
Calculate 2 to the power of 2 and get 4.
-16-13x=0
Subtract 20 from 4 to get -16.
-13x=16
Add 16 to both sides. Anything plus zero gives itself.
x=\frac{16}{-13}
Divide both sides by -13.
x=-\frac{16}{13}
Fraction \frac{16}{-13} can be rewritten as -\frac{16}{13} by extracting the negative sign.
Examples
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4 \sin \theta \cos \theta = 2 \sin \theta
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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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