Solve for x
x=20
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10=-20x-10+21x
Use the distributive property to multiply -5 by 4x+2.
10=x-10
Combine -20x and 21x to get x.
x-10=10
Swap sides so that all variable terms are on the left hand side.
x=10+10
Add 10 to both sides.
x=20
Add 10 and 10 to get 20.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
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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
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Limits
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