Solve for w
w=15
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w+3=18
The opposite of -3 is 3.
w=18-3
Subtract 3 from both sides.
w=15
Subtract 3 from 18 to get 15.
Examples
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Linear equation
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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