Solve for D
D=-3
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\frac{-18}{9}=D+1
Divide both sides by 9.
-2=D+1
Divide -18 by 9 to get -2.
D+1=-2
Swap sides so that all variable terms are on the left hand side.
D=-2-1
Subtract 1 from both sides.
D=-3
Subtract 1 from -2 to get -3.
Examples
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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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