Solve for x
x=-13
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8x-28-3\left(3x+1\right)=2-\left(7-x\right)
Use the distributive property to multiply 4 by 2x-7.
8x-28-9x-3=2-\left(7-x\right)
Use the distributive property to multiply -3 by 3x+1.
-x-28-3=2-\left(7-x\right)
Combine 8x and -9x to get -x.
-x-31=2-\left(7-x\right)
Subtract 3 from -28 to get -31.
-x-31=2-7-\left(-x\right)
To find the opposite of 7-x, find the opposite of each term.
-x-31=2-7+x
The opposite of -x is x.
-x-31=-5+x
Subtract 7 from 2 to get -5.
-x-31-x=-5
Subtract x from both sides.
-2x-31=-5
Combine -x and -x to get -2x.
-2x=-5+31
Add 31 to both sides.
-2x=26
Add -5 and 31 to get 26.
x=\frac{26}{-2}
Divide both sides by -2.
x=-13
Divide 26 by -2 to get -13.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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699 * 533
Matrix
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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}