Solve for x
x=-1
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7+10x-x=-2
Subtract x from both sides.
7+9x=-2
Combine 10x and -x to get 9x.
9x=-2-7
Subtract 7 from both sides.
9x=-9
Subtract 7 from -2 to get -9.
x=\frac{-9}{9}
Divide both sides by 9.
x=-1
Divide -9 by 9 to get -1.
Examples
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Linear equation
y = 3x + 4
Arithmetic
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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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