Solve for x
x=11
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18-x=7
Add 3 and 15 to get 18.
-x=7-18
Subtract 18 from both sides.
-x=-11
Subtract 18 from 7 to get -11.
x=11
Multiply both sides by -1.
Examples
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Linear equation
y = 3x + 4
Arithmetic
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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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