Solve for x
x=-4
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5x+9-x=-7
Subtract x from both sides.
4x+9=-7
Combine 5x and -x to get 4x.
4x=-7-9
Subtract 9 from both sides.
4x=-16
Subtract 9 from -7 to get -16.
x=\frac{-16}{4}
Divide both sides by 4.
x=-4
Divide -16 by 4 to get -4.
Examples
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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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