Solve for x
x=2
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2-4x=-2\times 3
Multiply both sides by 3.
2-4x=-6
Multiply -2 and 3 to get -6.
-4x=-6-2
Subtract 2 from both sides.
-4x=-8
Subtract 2 from -6 to get -8.
x=\frac{-8}{-4}
Divide both sides by -4.
x=2
Divide -8 by -4 to get 2.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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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