Solve for x
x=-2
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-12x-9+5x-5=0
Use the distributive property to multiply 3 by -4x-3.
-7x-9-5=0
Combine -12x and 5x to get -7x.
-7x-14=0
Subtract 5 from -9 to get -14.
-7x=14
Add 14 to both sides. Anything plus zero gives itself.
x=\frac{14}{-7}
Divide both sides by -7.
x=-2
Divide 14 by -7 to get -2.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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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