Solve for x
x=\frac{y}{2}-\frac{5}{4}
Solve for y
y=2x+\frac{5}{2}
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4x+5=2y
Add 2y to both sides. Anything plus zero gives itself.
4x=2y-5
Subtract 5 from both sides.
\frac{4x}{4}=\frac{2y-5}{4}
Divide both sides by 4.
x=\frac{2y-5}{4}
Dividing by 4 undoes the multiplication by 4.
x=\frac{y}{2}-\frac{5}{4}
Divide 2y-5 by 4.
-2y+5=-4x
Subtract 4x from both sides. Anything subtracted from zero gives its negation.
-2y=-4x-5
Subtract 5 from both sides.
\frac{-2y}{-2}=\frac{-4x-5}{-2}
Divide both sides by -2.
y=\frac{-4x-5}{-2}
Dividing by -2 undoes the multiplication by -2.
y=2x+\frac{5}{2}
Divide -4x-5 by -2.
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}