Solve for x
x=10
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-2=7-\left(x-\frac{2}{2}\right)
Subtract 2 from 2 to get 0.
-2=7-\left(x-1\right)
Divide 2 by 2 to get 1.
-2=7-x-\left(-1\right)
To find the opposite of x-1, find the opposite of each term.
-2=7-x+1
The opposite of -1 is 1.
-2=8-x
Add 7 and 1 to get 8.
8-x=-2
Swap sides so that all variable terms are on the left hand side.
-x=-2-8
Subtract 8 from both sides.
-x=-10
Subtract 8 from -2 to get -10.
x=10
Multiply both sides by -1.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
Arithmetic
699 * 533
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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