Solve for x
x=-2
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-x-3-4x=7
Subtract 4x from both sides.
-x-4x=7+3
Add 3 to both sides.
-x-4x=10
Add 7 and 3 to get 10.
-5x=10
Combine -x and -4x to get -5x.
x=\frac{10}{-5}
Divide both sides by -5.
x=-2
Divide 10 by -5 to get -2.
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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