Solve for x
x=6
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3x-x-x+2x=18
Combine 9x and -6x to get 3x.
2x-x+2x=18
Combine 3x and -x to get 2x.
x+2x=18
Combine 2x and -x to get x.
3x=18
Combine x and 2x to get 3x.
x=\frac{18}{3}
Divide both sides by 3.
x=6
Divide 18 by 3 to get 6.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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