Solve for x
x = \frac{8}{5} = 1\frac{3}{5} = 1.6
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12x-5=3+7x
Combine 4x and 8x to get 12x.
12x-5-7x=3
Subtract 7x from both sides.
5x-5=3
Combine 12x and -7x to get 5x.
5x=3+5
Add 5 to both sides.
5x=8
Add 3 and 5 to get 8.
x=\frac{8}{5}
Divide both sides by 5.
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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