Solve for x
x = \frac{20}{7} = 2\frac{6}{7} \approx 2.857142857
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x≔\frac{20}{7}
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x=4\times \frac{5}{7}
Divide 4 by \frac{7}{5} by multiplying 4 by the reciprocal of \frac{7}{5}.
x=\frac{4\times 5}{7}
Express 4\times \frac{5}{7} as a single fraction.
x=\frac{20}{7}
Multiply 4 and 5 to get 20.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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