Solve for x
x=-2
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-3x-8-x=0
Subtract x from both sides.
-4x-8=0
Combine -3x and -x to get -4x.
-4x=8
Add 8 to both sides. Anything plus zero gives itself.
x=\frac{8}{-4}
Divide both sides by -4.
x=-2
Divide 8 by -4 to get -2.
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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