Solve for x
x=-6
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5\times 2x-3\left(2x+4\right)=3\times 2x
Multiply both sides of the equation by 15, the least common multiple of 3,5.
10x-3\left(2x+4\right)=3\times 2x
Multiply 5 and 2 to get 10.
10x-6x-12=3\times 2x
Use the distributive property to multiply -3 by 2x+4.
4x-12=3\times 2x
Combine 10x and -6x to get 4x.
4x-12=6x
Multiply 3 and 2 to get 6.
4x-12-6x=0
Subtract 6x from both sides.
-2x-12=0
Combine 4x and -6x to get -2x.
-2x=12
Add 12 to both sides. Anything plus zero gives itself.
x=\frac{12}{-2}
Divide both sides by -2.
x=-6
Divide 12 by -2 to get -6.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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