Solve for x
x=-2
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0.1x+0.2=0
Swap sides so that all variable terms are on the left hand side.
0.1x=-0.2
Subtract 0.2 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-0.2}{0.1}
Divide both sides by 0.1.
x=-2
Expand \frac{-0.2}{0.1} by multiplying both numerator and the denominator by 10. Anything divided by one gives itself.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
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
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Limits
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