Solve for x
x=\frac{1}{3}\approx 0.333333333
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-\frac{9}{5}x=\frac{2}{5}-1
Subtract 1 from both sides.
-\frac{9}{5}x=\frac{2}{5}-\frac{5}{5}
Convert 1 to fraction \frac{5}{5}.
-\frac{9}{5}x=\frac{2-5}{5}
Since \frac{2}{5} and \frac{5}{5} have the same denominator, subtract them by subtracting their numerators.
-\frac{9}{5}x=-\frac{3}{5}
Subtract 5 from 2 to get -3.
x=-\frac{3}{5}\left(-\frac{5}{9}\right)
Multiply both sides by -\frac{5}{9}, the reciprocal of -\frac{9}{5}.
x=\frac{-3\left(-5\right)}{5\times 9}
Multiply -\frac{3}{5} times -\frac{5}{9} by multiplying numerator times numerator and denominator times denominator.
x=\frac{15}{45}
Do the multiplications in the fraction \frac{-3\left(-5\right)}{5\times 9}.
x=\frac{1}{3}
Reduce the fraction \frac{15}{45} to lowest terms by extracting and canceling out 15.
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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\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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