Solve for x
x=-13
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-3x-4-6x=9-8x
Combine x and -4x to get -3x.
-9x-4=9-8x
Combine -3x and -6x to get -9x.
-9x-4+8x=9
Add 8x to both sides.
-x-4=9
Combine -9x and 8x to get -x.
-x=9+4
Add 4 to both sides.
-x=13
Add 9 and 4 to get 13.
x=-13
Multiply both sides by -1.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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