Solve for a
a=3x-4
Solve for x
x=\frac{a+4}{3}
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a-2x+4=x
Use the distributive property to multiply -2 by x-2.
a+4=x+2x
Add 2x to both sides.
a+4=3x
Combine x and 2x to get 3x.
a=3x-4
Subtract 4 from both sides.
a-2x+4=x
Use the distributive property to multiply -2 by x-2.
a-2x+4-x=0
Subtract x from both sides.
a-3x+4=0
Combine -2x and -x to get -3x.
-3x+4=-a
Subtract a from both sides. Anything subtracted from zero gives its negation.
-3x=-a-4
Subtract 4 from both sides.
\frac{-3x}{-3}=\frac{-a-4}{-3}
Divide both sides by -3.
x=\frac{-a-4}{-3}
Dividing by -3 undoes the multiplication by -3.
x=\frac{a+4}{3}
Divide -a-4 by -3.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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}