Solve for x
x=7
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7x+9-9x=-5
Subtract 9x from both sides.
-2x+9=-5
Combine 7x and -9x to get -2x.
-2x=-5-9
Subtract 9 from both sides.
-2x=-14
Subtract 9 from -5 to get -14.
x=\frac{-14}{-2}
Divide both sides by -2.
x=7
Divide -14 by -2 to get 7.
Examples
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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
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Limits
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