Solve for x
x = -\frac{7}{2} = -3\frac{1}{2} = -3.5
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x-3\left(1+x\right)=\frac{8}{2}
Divide both sides by 2.
x-3\left(1+x\right)=4
Divide 8 by 2 to get 4.
x-3-3x=4
Use the distributive property to multiply -3 by 1+x.
-2x-3=4
Combine x and -3x to get -2x.
-2x=4+3
Add 3 to both sides.
-2x=7
Add 4 and 3 to get 7.
x=\frac{7}{-2}
Divide both sides by -2.
x=-\frac{7}{2}
Fraction \frac{7}{-2} can be rewritten as -\frac{7}{2} by extracting the negative sign.
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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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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