Solve for x
x=7
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2x-5+x-5+1=12
Combine x and x to get 2x.
3x-5-5+1=12
Combine 2x and x to get 3x.
3x-10+1=12
Subtract 5 from -5 to get -10.
3x-9=12
Add -10 and 1 to get -9.
3x=12+9
Add 9 to both sides.
3x=21
Add 12 and 9 to get 21.
x=\frac{21}{3}
Divide both sides by 3.
x=7
Divide 21 by 3 to get 7.
Examples
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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
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Limits
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