Solve for x
x=-4
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3x-8-5x=0
Subtract 5x from both sides.
-2x-8=0
Combine 3x and -5x to get -2x.
-2x=8
Add 8 to both sides. Anything plus zero gives itself.
x=\frac{8}{-2}
Divide both sides by -2.
x=-4
Divide 8 by -2 to get -4.
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
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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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