Solve for x
x=-10
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8-4x+3\left(x-1\right)=15
Use the distributive property to multiply 4 by 2-x.
8-4x+3x-3=15
Use the distributive property to multiply 3 by x-1.
8-x-3=15
Combine -4x and 3x to get -x.
5-x=15
Subtract 3 from 8 to get 5.
-x=15-5
Subtract 5 from both sides.
-x=10
Subtract 5 from 15 to get 10.
x=-10
Multiply both sides by -1.
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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\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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