Solve for x
x = \frac{22}{7} = 3\frac{1}{7} \approx 3.142857143
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\frac{1}{2}x+\frac{1}{2}\times 6=4\left(x-2\right)
Use the distributive property to multiply \frac{1}{2} by x+6.
\frac{1}{2}x+\frac{6}{2}=4\left(x-2\right)
Multiply \frac{1}{2} and 6 to get \frac{6}{2}.
\frac{1}{2}x+3=4\left(x-2\right)
Divide 6 by 2 to get 3.
\frac{1}{2}x+3=4x-8
Use the distributive property to multiply 4 by x-2.
\frac{1}{2}x+3-4x=-8
Subtract 4x from both sides.
-\frac{7}{2}x+3=-8
Combine \frac{1}{2}x and -4x to get -\frac{7}{2}x.
-\frac{7}{2}x=-8-3
Subtract 3 from both sides.
-\frac{7}{2}x=-11
Subtract 3 from -8 to get -11.
x=-11\left(-\frac{2}{7}\right)
Multiply both sides by -\frac{2}{7}, the reciprocal of -\frac{7}{2}.
x=\frac{-11\left(-2\right)}{7}
Express -11\left(-\frac{2}{7}\right) as a single fraction.
x=\frac{22}{7}
Multiply -11 and -2 to get 22.
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y = 3x + 4
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Matrix
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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
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}