Solve for x
x=-\frac{7}{9}\approx -0.777777778
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x-5x-\left(-7\right)-7-5x=7
To find the opposite of 5x-7, find the opposite of each term.
x-5x+7-7-5x=7
The opposite of -7 is 7.
-4x+7-7-5x=7
Combine x and -5x to get -4x.
-4x-5x=7
Subtract 7 from 7 to get 0.
-9x=7
Combine -4x and -5x to get -9x.
x=\frac{7}{-9}
Divide both sides by -9.
x=-\frac{7}{9}
Fraction \frac{7}{-9} can be rewritten as -\frac{7}{9} by extracting the negative sign.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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