Solve for x
x=7
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x-9=\frac{-8}{4}
Divide both sides by 4.
x-9=-2
Divide -8 by 4 to get -2.
x=-2+9
Add 9 to both sides.
x=7
Add -2 and 9 to get 7.
Examples
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Linear equation
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Matrix
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\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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