Solve for x
x=-2
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0x=0\times 4-2\left(x+2\right)
Multiply 0 and 4 to get 0.
0=0\times 4-2\left(x+2\right)
Anything times zero gives zero.
0=0-2\left(x+2\right)
Multiply 0 and 4 to get 0.
0=0-2x-4
Use the distributive property to multiply -2 by x+2.
0=-4-2x
Subtract 4 from 0 to get -4.
-4-2x=0
Swap sides so that all variable terms are on the left hand side.
-2x=4
Add 4 to both sides. Anything plus zero gives itself.
x=\frac{4}{-2}
Divide both sides by -2.
x=-2
Divide 4 by -2 to get -2.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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