Solve for x
x=-\frac{3}{7}\approx -0.428571429
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2\left(x-1\right)=5\left(x-2x-1\right)
Multiply both sides of the equation by 10, the least common multiple of 5,2.
2x-2=5\left(x-2x-1\right)
Use the distributive property to multiply 2 by x-1.
2x-2=5\left(-x-1\right)
Combine x and -2x to get -x.
2x-2=-5x-5
Use the distributive property to multiply 5 by -x-1.
2x-2+5x=-5
Add 5x to both sides.
7x-2=-5
Combine 2x and 5x to get 7x.
7x=-5+2
Add 2 to both sides.
7x=-3
Add -5 and 2 to get -3.
x=\frac{-3}{7}
Divide both sides by 7.
x=-\frac{3}{7}
Fraction \frac{-3}{7} can be rewritten as -\frac{3}{7} by extracting the negative sign.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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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
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}