Solve for x
x=-2
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-2x-7x=18
Subtract 7x from both sides.
-9x=18
Combine -2x and -7x to get -9x.
x=\frac{18}{-9}
Divide both sides by -9.
x=-2
Divide 18 by -9 to get -2.
Examples
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Matrix
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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