Solve for x
x=5
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6x-15-3x=0
Subtract 3x from both sides.
3x-15=0
Combine 6x and -3x to get 3x.
3x=15
Add 15 to both sides. Anything plus zero gives itself.
x=\frac{15}{3}
Divide both sides by 3.
x=5
Divide 15 by 3 to get 5.
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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