Solve for x
x=3
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5x-10+2\left(x-5\right)-1=0
Use the distributive property to multiply 5 by x-2.
5x-10+2x-10-1=0
Use the distributive property to multiply 2 by x-5.
7x-10-10-1=0
Combine 5x and 2x to get 7x.
7x-20-1=0
Subtract 10 from -10 to get -20.
7x-21=0
Subtract 1 from -20 to get -21.
7x=21
Add 21 to both sides. Anything plus zero gives itself.
x=\frac{21}{7}
Divide both sides by 7.
x=3
Divide 21 by 7 to get 3.
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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