Solve for x
x = \frac{5}{2} = 2\frac{1}{2} = 2.5
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x^{2}+5-\left(x^{2}+2x-3\right)=4x-7
Use the distributive property to multiply x-1 by x+3 and combine like terms.
x^{2}+5-x^{2}-2x+3=4x-7
To find the opposite of x^{2}+2x-3, find the opposite of each term.
5-2x+3=4x-7
Combine x^{2} and -x^{2} to get 0.
8-2x=4x-7
Add 5 and 3 to get 8.
8-2x-4x=-7
Subtract 4x from both sides.
8-6x=-7
Combine -2x and -4x to get -6x.
-6x=-7-8
Subtract 8 from both sides.
-6x=-15
Subtract 8 from -7 to get -15.
x=\frac{-15}{-6}
Divide both sides by -6.
x=\frac{5}{2}
Reduce the fraction \frac{-15}{-6} to lowest terms by extracting and canceling out -3.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
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}