Solve for a
a=5x-21
Solve for x
x=\frac{a+21}{5}
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a-5x+10=-11
Use the distributive property to multiply -5 by x-2.
a+10=-11+5x
Add 5x to both sides.
a=-11+5x-10
Subtract 10 from both sides.
a=-21+5x
Subtract 10 from -11 to get -21.
a-5x+10=-11
Use the distributive property to multiply -5 by x-2.
-5x+10=-11-a
Subtract a from both sides.
-5x=-11-a-10
Subtract 10 from both sides.
-5x=-21-a
Subtract 10 from -11 to get -21.
-5x=-a-21
The equation is in standard form.
\frac{-5x}{-5}=\frac{-a-21}{-5}
Divide both sides by -5.
x=\frac{-a-21}{-5}
Dividing by -5 undoes the multiplication by -5.
x=\frac{a+21}{5}
Divide -21-a by -5.
Examples
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{ 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}