Solve for x
x=\frac{5}{6}\approx 0.833333333
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8x+4-2x=9
Subtract 2x from both sides.
6x+4=9
Combine 8x and -2x to get 6x.
6x=9-4
Subtract 4 from both sides.
6x=5
Subtract 4 from 9 to get 5.
x=\frac{5}{6}
Divide both sides by 6.
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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