Solve for x
x=-1
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4-5x-7=3x+5
To find the opposite of 5x+7, find the opposite of each term.
-3-5x=3x+5
Subtract 7 from 4 to get -3.
-3-5x-3x=5
Subtract 3x from both sides.
-3-8x=5
Combine -5x and -3x to get -8x.
-8x=5+3
Add 3 to both sides.
-8x=8
Add 5 and 3 to get 8.
x=\frac{8}{-8}
Divide both sides by -8.
x=-1
Divide 8 by -8 to get -1.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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}