Solve for x
x=-36
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3x-36=2\times 2x
Multiply both sides of the equation by 6, the least common multiple of 2,3.
3x-36=4x
Multiply 2 and 2 to get 4.
3x-36-4x=0
Subtract 4x from both sides.
-x-36=0
Combine 3x and -4x to get -x.
-x=36
Add 36 to both sides. Anything plus zero gives itself.
x=-36
Multiply both sides by -1.
Examples
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Linear equation
y = 3x + 4
Arithmetic
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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