Solve for x
x = -\frac{65}{7} = -9\frac{2}{7} \approx -9.285714286
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Linear Equation
5 problems similar to:
\frac{ 2x-1 }{ 4 } - \frac{ 4x+5 }{ 5 } = \frac{ 1 }{ 20 } x+2
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5\left(2x-1\right)-4\left(4x+5\right)=1x+40
Multiply both sides of the equation by 20, the least common multiple of 4,5,20.
10x-5-4\left(4x+5\right)=1x+40
Use the distributive property to multiply 5 by 2x-1.
10x-5-16x-20=1x+40
Use the distributive property to multiply -4 by 4x+5.
-6x-5-20=1x+40
Combine 10x and -16x to get -6x.
-6x-25=1x+40
Subtract 20 from -5 to get -25.
-6x-25-x=40
Subtract 1x from both sides.
-7x-25=40
Combine -6x and -x to get -7x.
-7x=40+25
Add 25 to both sides.
-7x=65
Add 40 and 25 to get 65.
x=\frac{65}{-7}
Divide both sides by -7.
x=-\frac{65}{7}
Fraction \frac{65}{-7} can be rewritten as -\frac{65}{7} by extracting the negative sign.
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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699 * 533
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\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}