Solve for x
x=-\frac{4}{45}\approx -0.088888889
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45x+4=0
Combine 25x and 20x to get 45x.
45x=-4
Subtract 4 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-4}{45}
Divide both sides by 45.
x=-\frac{4}{45}
Fraction \frac{-4}{45} can be rewritten as -\frac{4}{45} by extracting the negative sign.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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