Solve for x
x=-5
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x-3x-15=3x+10
Use the distributive property to multiply -3 by x+5.
-2x-15=3x+10
Combine x and -3x to get -2x.
-2x-15-3x=10
Subtract 3x from both sides.
-5x-15=10
Combine -2x and -3x to get -5x.
-5x=10+15
Add 15 to both sides.
-5x=25
Add 10 and 15 to get 25.
x=\frac{25}{-5}
Divide both sides by -5.
x=-5
Divide 25 by -5 to get -5.
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
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}