Solve for x
x=-7
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5x+5=2\left(2x-1\right)
Multiply both sides of the equation by 10, the least common multiple of 2,5.
5x+5=4x-2
Use the distributive property to multiply 2 by 2x-1.
5x+5-4x=-2
Subtract 4x from both sides.
x+5=-2
Combine 5x and -4x to get x.
x=-2-5
Subtract 5 from both sides.
x=-7
Subtract 5 from -2 to get -7.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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